Directory
Who works with seaweed, everywhere
Farms, harvesters, processors, makers, researchers and the organisations around them. Free to read, no account needed. Every entry shows where its facts come from and how far we have checked them.
221 organisations
- Product maker
12 Tides
California, United States
Kelp snack brand that sources its seaweed in the United States.
Listed from a public source - Product maker
7 Fathoms Seaweed Skin Care
Newfoundland and Labrador, Canada
Makes skin and hair products based on Laminaria digitata extract.
Species: Horsetail kelp
Listed from a public source - Product maker and 1 more
Acadian Seaplants Limited
Nova Scotia, Canada
Develops seaweed ingredients and products for plant, animal and human applications.
Species: Rockweed
Checked by us - Product maker
Advanced Micro Polymers Inc.
Ontario, Canada
Advertises seaweed fertilizer among its agricultural products.
Listed from a public source - Government agency
Alaska Department of Fish and Game
Alaska, United States
Issues permits for commercial wild harvest of seaweed in Alaska.
Listed from a public source - Government agency
Alaska Department of Natural Resources
Alaska, United States
Issues leases for aquatic farm sites in Alaska, including seaweed farms.
Listed from a public source - Farm
Alaska Ocean Farms LLC
Alaska, United States
Named in a state public notice concerning amendments to a kelp-farm lease in Kalsin Bay.
Listed from a public source - Research body and 1 more
Alaska Sea Grant
Alaska, United States
Sea Grant programme with seaweed extension work; co-presented the 2023 State of the States report.
Listed from a public source - Non-profit or support organisation and 1 more
AltaSeads Conservancy
California, United States
Non-profit that runs a kelp seed bank in San Pedro.
Species: Giant kelp, Bull kelp, Horsetail kelp, Winged kelp
Listed from a public source - Association or cooperative
Aquaculture Association of Nova Scotia
Nova Scotia, Canada
Maintains a membership category for sea-plant producers alongside other aquaculture businesses.
Checked by us - Processor and 1 more
AquAgri Processing Pvt. Ltd.
Manamadurai, Tamil Nadu, India
Describes seaweed cultivation, carrageenan processing and production of agricultural seaweed extracts.
Checked by us - Wild harvester
Atlantic Holdfast Seaweed Company
Maine, United States
Describes hand harvesting sea vegetables from Penobscot Bay.
Species: Sugar kelp, Dulse, Bladderwrack, Chondrus crispus
Listed from a public source - Wild harvester and 1 more
Atlantic Mariculture Ltd.
New Brunswick, Canada
Harvests and processes organic dulse at Dark Harbour on Grand Manan since 1974, and sells Alaria flakes.
Species: Dulse, Winged kelp
Checked by us - Nursery or seed producer and 1 more
Atlantic Sea Farms
Maine, United States
A company letter describes cultivation-centre seed production and technical support for Maine kelp farmers.
Listed from a public source - Product maker
Barnacle Foods
Alaska, United States
Makes kelp foods in Juneau: pickles, hot sauces, chili crisp and kelp salts.
Checked by us - Wild harvester and 1 more
BC Kelp
British Columbia, Canada
Family business that selectively hand harvests wild BC seaweed in small batches, sold ready to eat.
Species: Bladderwrack, Bull kelp, Giant kelp, Winged kelp, Horsetail kelp
Checked by us - Government agency
BC Ministry of Water, Land and Resource Stewardship
British Columbia, Canada
The Province licenses wild aquatic plant harvesting and aquatic plant culture under the Fish and Seafood Licensing Regulation; the ministry reviews aquaculture applications with DFO and Transport Canada through FrontCounter BC.
Checked by us - Equipment or services
BCL Biotechnologies Ltd.
British Columbia, Canada
Supported LGL Limited in preparing the 2024 RDMW Seaweed Industry Development Plan.
Listed from a public source - Farm
Bill & Stanley Oyster Company Ltd
Nova Scotia, Canada
Shellfish farm holding three Nova Scotia sites licensed for shellfish and marine plants.
Listed from a public source - Buyer or distributor
Bio-Ag Consultants & Distributors Inc.
Ontario, Canada
Agricultural distributor in Wellesley, Ontario, selling dried seaweed meal and a seaweed blend for pets.
Checked by us - Farm and 1 more
Blue Dot Sea Farms
Washington, United States
Describes a shellfish and seaweed farm at Hood Head and a kelp-snack brand.
Listed from a public source - Farm
Blue Lantern Shellfish Ltd
Nova Scotia, Canada
Shellfish farm with a site licensed for shellfish and marine plants at Arichat Harbour and a 2025 option for scallops and sugar kelp in Mahone Bay.
Species: Sugar kelp
Listed from a public source - Farm and 1 more
Blue Ocean Barns
Hawaii, United States
Grows red seaweed on land and sells Brominata, a cattle feed product marketed to reduce methane; headquartered in San Diego.
Species: Limu kohu
Listed from a public source - Farm
Bounty Bay Shellfish Inc
Nova Scotia, Canada
Shellfish farm whose Nova Scotia licence includes marine plants; sugar kelp added by amendment in 2021.
Species: Sugar kelp
Listed from a public source - Government agency and 1 more
Bureau of Fisheries and Aquatic Resources (Philippines)
Metro Manila, Philippines
National fisheries bureau under the Department of Agriculture; opened its first seaweed bioreactor in 2026 to produce seedlings for Zamboanga, Palawan, Bangsamoro and other areas.
Species: Cottonii (trade name, Kappaphycus)
Listed from a public source - Research body and 2 more
Cal Poly Humboldt
California, United States
Runs California's first commercially licensed open-water seaweed farm (2019) in Humboldt Bay, growing dulse and bull kelp, with an onshore kelp hatchery.
Species: Bull kelp, Dulse
Listed from a public source - Government agency
California Department of Fish and Wildlife
California, United States
Coordinates permits for farms in state waters, requires aquaculture registration, and regulates wild kelp harvest in California.
Species: Giant kelp
Checked by us - Government agency
California Fish and Game Commission
California, United States
Issues state water bottom leases for aquaculture in most of California.
Listed from a public source - Government agency and 1 more
California Ocean Protection Council
California, United States
State council that funds kelp research and restoration in California, including through California Sea Grant.
Species: Bull kelp, Giant kelp
Listed from a public source - Research body and 2 more
California Sea Grant
California, United States
Sea Grant programme with an aquaculture extension specialist at Scripps; administers state kelp research funding.
Listed from a public source - Farm
California Seaweed Co.
California, United States
Early-stage company growing native culinary seaweeds, started from a UC San Diego project.
Listed from a public source - Research body and 1 more
Canadian Centre for Fisheries Innovation
Newfoundland and Labrador, Canada
Funds and publishes applied seaweed research in Newfoundland and Labrador, including a 2025 seaweed forum and nursery research.
Listed from a public source - Nursery or seed producer and 1 more
Canadian Kelp Research (formerly Canadian Kelp Resources)
British Columbia, Canada
Seed production, nursery advice, restoration; earlier wild harvest and food products
Listed from a public source - Research body
Canadian Museum of Nature
Quebec, Canada
Leads research on Arctic kelp forests and seaweed biodiversity around Cambridge Bay, Nunavut, with Laval University; fieldwork planned for August and September 2026.
Checked by us - Nursery or seed producer and 1 more
Canadian Pacifico Seaweeds
British Columbia, Canada
Farm advice, cultivation support and sales; seed in development
Listed from a public source - Farm
Cape Breton Bivalve Inc
Nova Scotia, Canada
Shellfish farm with a Nova Scotia site licensed for shellfish and kelp (2020 renewal).
Listed from a public source - Farm and 2 more
Cascadia Seaweed
British Columbia, Canada
Grows local kelp on marine farms with coastal First Nations and makes liquid kelp extracts for crop growers; also advises on kelp restoration and monitoring.
Species: Sugar kelp, Winged kelp, Giant kelp
Checked by us - Research body
Centre for Marine Applied Research
Nova Scotia, Canada
Published research on barriers and opportunities for seaweed aquaculture in Nova Scotia.
Checked by us - Farm
Chatham Kelp
Massachusetts, United States
Kelp farm on Cape Cod, pictured in the Massachusetts section of the State of the States report.
Species: Sugar kelp
Listed from a public source - Processor and 1 more
CJ CheilJedang
Seoul, South Korea
Large Korean food company with a gim business; planned a gim factory in the United States (2020).
Species: Nori
Listed from a public source - Wild harvester and 1 more
Confidence Fishing Company
British Columbia, Canada
Wild harvests giant kelp; dried products
Species: Giant kelp
Listed from a public source - Farm
Connaigre Fish Farms Inc.
Newfoundland and Labrador, Canada
Planning a seaweed farm on the Connaigre Peninsula, with nursery research by Memorial University (report November 2025).
Listed from a public source - Government agency
Connecticut Department of Agriculture, Bureau of Aquaculture
Connecticut, United States
Issues kelp-only licences (five years) under the Connecticut shellfish model.
Listed from a public source - Research body and 1 more
Connecticut Sea Grant
Connecticut, United States
Sea Grant programme with seaweed extension and Gracilaria research.
Species: Sugar kelp, Gracilaria
Listed from a public source - Farm
Cooke Aquaculture
New Brunswick, Canada
Aquaculture company that has grown seaweed alongside fish in integrated multi-trophic aquaculture projects with the University of New Brunswick.
Listed from a public source - Non-profit or support organisation and 1 more
Créneau d'excellence Ressources, sciences et technologies marines (RSTM)
Quebec, Canada
Network supporting marine businesses, including seaweed farming, across Quebec's four maritime regions.
Listed from a public source - Research body
CSIR Central Salt and Marine Chemicals Research Institute (CSMCRI)
Gujarat, India
National research institute that maps seaweed farming sites and develops seaweed cultivation and products.
Species: Cottonii (trade name, Kappaphycus), Gracilaria
Checked by us - Farm
Current Sea Products Inc.
Nova Scotia, Canada
Province lists marine-plant aquaculture site 1477 in Pubnico Harbour.
Listed from a public source - Processor
DAE CHUN FOODS CO., LTD.
Boryeong, South Korea
Describes processing and packaging seaweed foods in Boryeong.
Species: Nori
Listed from a public source - Processor and 1 more
Daesang Corporation
Seoul, South Korea
Large Korean food company; the first Korean firm to make gim abroad (Indonesia) and has a newer gim plant in Vietnam.
Species: Nori
Listed from a public source - Wild harvester and 1 more
Dakini Tidal Wilds
British Columbia, Canada
Hand harvests wild seaweed on the west coast of Vancouver Island; sells seaweed products and runs courses, tours and workshops.
Species: Bull kelp, Winged kelp
Checked by us - Government agency
Department of Fisheries (Vietnam)
National, Vietnam
National fisheries authority; reported about 16,500 hectares of seaweed producing 150,000 tonnes in 2023, against a national target of 500,000 tonnes by 2030.
Species: Cottonii (trade name, Kappaphycus), Gracilaria, Sea grapes
Listed from a public source - Government agency
Department of Fisheries Malaysia
National, Malaysia
National fisheries department; runs seaweed development programmes, including cluster farming to upgrade existing farmers.
Species: Cottonii (trade name, Kappaphycus)
Listed from a public source - Government agency and 1 more
Department of Fisheries, Ministry of Fisheries, Animal Husbandry and Dairying (India)
National, India
Funds seaweed farming under PMMSY (about Rs 198 crore of projects 2020 to 2025), including the Tamil Nadu multipurpose seaweed park, and identified 384 farming sites on 24,707 hectares.
Listed from a public source - Farm and 1 more
DT Khanh Hoa Seaweed (DT Group)
Khanh Hoa, Vietnam
Farms Japanese sea grapes on about 80 hectares with some 70 farming households in Khanh Hoa, Phu Yen and Ninh Thuan; recognised in 2020 as Vietnam's largest sea grape farm.
Species: Sea grapes
Listed from a public source - Non-profit or support organisation and 4 more
Ecology Action Centre
Nova Scotia, Canada
Runs the Kelp Kurious seaweed farm, seedling hatchery and training centre at Mahone Bay, supporting small seaweed farms and product businesses.
Species: Sugar kelp, Horsetail kelp, Dulse, Nori
Checked by us - Non-profit or support organisation
Ecotrust Canada
British Columbia, Canada
Non-profit; regenerative ocean farm work with Metlakatla
Checked by us - Farm
Ferme Maricole Purmer
Quebec, Canada
Describes cultivating edible seaweeds alongside mussels and scallops in the Sept-Îles archipelago.
Checked by us - Nursery or seed producer and 1 more
Ferme Marine du Québec
Quebec, Canada
Produces seeded seaweed lines from its hatchery in Newport and sells seaweed collectors to other farms.
Species: Sugar kelp
Listed from a public source - Government agency
Fisheries Agency of Japan
Tokyo, Japan
National fisheries agency (part of the agriculture ministry); publishes fisheries statistics and the Fisheries White Paper, including nori and other seaweed farming.
Species: Nori, Kombu, Wakame
Checked by us - Government agency and 1 more
Fisheries and Oceans Canada
National, Canada
Federal department that assesses and manages Atlantic marine plant harvests such as rockweed and Irish moss, and reviews aquaculture applications. Does not license seaweed in BC.
Species: Rockweed, Chondrus crispus
Listed from a public source - Product maker
gimMe Snacks
National, United States
Brand of roasted seaweed snacks.
Species: Nori
Listed from a public source - Wild harvester
GNP Ventures Inc.
Newfoundland and Labrador, Canada
Early-stage company exploring seaweed and kelp harvest on the Great Northern Peninsula.
Listed from a public source - Non-profit or support organisation
Greater Farallones Association
California, United States
Leads the Greater Farallones Kelp Restoration Project with NOAA: urchin reduction and outplanting lab-grown bull kelp (July 2026).
Species: Bull kelp
Checked by us - Processor
Green Fresh Biotechnology (formerly Green Fresh Marine Science)
Fujian, China
Makes agar, carrageenan and konjac gum from farmed seaweed; design capacity about 7,300 tonnes of agar and 10,400 tonnes of carrageenan a year; owns PT Hongxin in Indonesia.
Species: Gracilaria, Cottonii (trade name, Kappaphycus)
Checked by us - Wild harvester and 1 more
Green Sea Harvest
New Brunswick, Canada
Dulse drying operation on Grand Manan: harvested dulse is dried on netted stone beds.
Species: Dulse
Listed from a public source - Non-profit or support organisation and 4 more
GreenWave
Connecticut, United States
Describes ocean-farmer training, a commercial research farm and sugar-kelp seed production.
Species: Sugar kelp
Checked by us - Government agency
Hawaii Division of Aquatic Resources
Hawaii, United States
Part of the Department of Land and Natural Resources; coordinates farm permits and aquatic plant collection permits, and produces seaweed seed for industry and urchin stock enhancement.
Checked by us - Research body and 1 more
Hawaii Sea Grant
Hawaii, United States
Sea Grant programme that contributed the Hawaii seaweed section of the State of the States report.
Listed from a public source - Research body and 1 more
Hokkaido University, Faculty of Fisheries Sciences
Hokkaido, Japan
Fisheries faculty with seaweed research on reproduction, breeding and stress tolerance.
Species: Kombu
Listed from a public source - Nursery or seed producer and 1 more
Holdfast Aquaculture
California, United States
Land-based hatchery producing California-native kelp and shellfish seed, with a long-line operation in Humboldt Bay.
Species: Giant kelp, Bull kelp
Listed from a public source - Farm and 1 more
HoldFastNL Seaweed Company
Newfoundland and Labrador, Canada
Describes kelp cultivation and production of liquid seaweed extracts in Newfoundland and Labrador.
Listed from a public source - Processor and 1 more
Hongzheng Aquatic Produce Company
Shandong, China
Rongcheng company that exported dried wakame to Egypt, reported as a first for the city.
Species: Wakame
Listed from a public source - Research body and 2 more
ICAR Central Marine Fisheries Research Institute (CMFRI)
Tamil Nadu, India
National marine fisheries institute doing seaweed work since 1966; its Mandapam centre was named India's Centre of Excellence for seaweeds in January 2025 and has a seaweed plantlet unit.
Species: Gracilaria, Cottonii (trade name, Kappaphycus)
Checked by us - Farm
Indian Point Marine Farms Ltd
Nova Scotia, Canada
Shellfish farm with a Nova Scotia site licensed for shellfish and marine plants.
Listed from a public source - Association or cooperative
Indonesian Seaweed Association (ARLI)
National, Indonesia
National seaweed association; reported in 2024 that 45 processing factories were operating after 10 had closed since 2016.
Species: Cottonii (trade name, Kappaphycus), Gracilaria
Listed from a public source - Association or cooperative
Indonesian Seaweed Farmers and Processors Association (ASPERLI)
National, Indonesia
Association of seaweed farmers and processors; one of three industry associations engaged in an Australian research project.
Listed from a public source - Association or cooperative
Indonesian Seaweed Industry Association (ASTRULI)
National, Indonesia
Association of seaweed processors (about 20 members in 2019); promoted an Indonesia Seaweed brand for traceable, certified companies.
Species: Cottonii (trade name, Kappaphycus)
Listed from a public source - Equipment or services
Industrial Plankton
British Columbia, Canada
Makes bioreactors in Victoria, including seaweed bioreactors for growing macroalgae cultures.
Checked by us - Research body
Institute of Oceanology, Chinese Academy of Sciences
Shandong, China
Ocean research institute in Qingdao with seaweed research, including growth and stress in nori-type seaweeds and algae breeding.
Species: Nori
Listed from a public source - Research body and 1 more
IPB University, Faculty of Fisheries and Marine Sciences
West Java, Indonesia
University with seaweed research on bioactives, hydrocolloids, policy and supply chains.
Listed from a public source - Research body and 1 more
Iwate Fisheries Technology Center
Iwate, Japan
Prefectural fisheries research centre in the 2026 Iwate seaweed consortium on wakame and kombu breeding and conservation.
Species: Wakame, Kombu
Listed from a public source - Research body and 1 more
Japan Fisheries Research and Education Agency
National, Japan
National fisheries research and training agency with bases across Japan, including seaweed and aquaculture research.
Listed from a public source - Association or cooperative
Japan Kombu Association
Osaka, Japan
National kombu industry association founded in 1949 (production, distribution and trade research); set 15 November as Kombu Day; held its 2026 general meeting in Nagoya.
Species: Kombu
Checked by us - Processor
KANERYO Sea Vegetable CORP.
Uto, Kumamoto, Japan
Describes drying, salting, packing and processing sea vegetables for food.
Species: Wakame
Checked by us - Materials maker
Keel Labs (formerly AlgiKnit)
North Carolina, United States
Makes Kelsun, a textile fibre made from seaweed biopolymers; formerly AlgiKnit, founded 2017.
Listed from a public source - Farm
Kelly Cove Salmon Ltd
Nova Scotia, Canada
Salmon farm with a Nova Scotia site licensed for finfish and marine plants.
Listed from a public source - Farm and 1 more
Kelp Blue
Alaska, United States
Company page describes development of a giant-kelp farm and hatchery operations in Alaska.
Species: Giant kelp
Listed from a public source - Processor
KIMICA Corporation
Tokyo, Japan
Describes manufacturing alginates and seaweed-derived ingredients for multiple applications.
Listed from a public source - Research body
Kitasato University
Iwate, Japan
University partner in the 2026 Iwate seaweed consortium on wakame and kombu breeding and conservation.
Species: Wakame, Kombu
Listed from a public source - Government agency
Korea Agro-Fisheries & Food Trade Corporation (aT)
National, South Korea
State trade agency that tracks and promotes gim exports by market.
Species: Nori
Listed from a public source - Association or cooperative
Korea Laver Farmers' Association
South Jeolla, South Korea
Association of gim farming fishers; its Wando chapter co-organised Gim Day.
Species: Nori
Listed from a public source - Association or cooperative
Korea Laver Industry Association
National, South Korea
National gim industry association; runs the gim self-help fund and hosts the annual Gim Day.
Species: Nori
Listed from a public source - Association or cooperative
Korea Laver Producers' Association
South Jeolla, South Korea
Association of gim producers; its Wando chapter co-organised Gim Day.
Species: Nori
Listed from a public source - Research body
Korea Maritime Institute
Busan, South Korea
Government research institute that reports gim production and market figures.
Species: Nori
Listed from a public source - Research body and 1 more
Kumamoto Prefectural Fisheries Research Center
Kumamoto, Japan
Prefectural research centre with a seaweed facility; researches nori and, since 2013, hitoegusa and wakame.
Species: Nori, Hitoegusa, Wakame
Listed from a public source - Nursery or seed producer
LeBlanc Seeded Lines
Nova Scotia, Canada
Province lists land-based aquaculture site 1456 and a decision covering sugar kelp and Alaria.
Species: Sugar kelp, Winged kelp
Listed from a public source - Equipment or services
LGL Limited
British Columbia, Canada
Environmental research consultancy that led the 2024 RDMW Seaweed Industry Development Plan.
Listed from a public source - Equipment or services
Lighthouse Environmental Consulting
British Columbia, Canada
Supported LGL Limited in preparing the 2024 RDMW Seaweed Industry Development Plan.
Listed from a public source - Materials maker
Loliware
California, United States
Makes seaweed-based resins (SEA Tech, offered for licensing) and a seaweed straw to replace single-use plastics.
Checked by us - Farm
Lummi Island SeaGreens
Washington, United States
Grows sugar kelp in Legoe Bay on the site of a salmon reefnet fishery in the off-season; first harvest April 2023.
Species: Sugar kelp
Checked by us - Buyer or distributor and 1 more
Maine Coast Sea Vegetables
Maine, United States
Sells North Atlantic seaweeds retail and wholesale from its facility in Hancock, Maine: alaria, bladderwrack, dulse, Irish moss, sugar kelp, laver, rockweed and sea lettuce.
Species: Winged kelp, Bladderwrack, Dulse, Chondrus crispus, Sugar kelp, Nori, Rockweed, Sea lettuce
Checked by us - Government agency
Maine Department of Marine Resources
Maine, United States
Issues licences and leases for seaweed and shellfish aquaculture in Maine; seaweed grown must come from Maine waters.
Listed from a public source - Research body and 1 more
Maine Sea Grant
Maine, United States
Sea Grant programme with seaweed extension work; co-presented the 2023 State of the States report.
Listed from a public source - Non-profit or support organisation
Mālama Maunalua
Hawaii, United States
Removes about 70,000 pounds of invasive algae from Maunalua Bay each year and turns all of it into soil amendment and compost.
Listed from a public source - Processor
Marcel Carrageenan / Marcel Trading Corporation
Quezon City, Philippines
Describes manufacturing carrageenan and carrageenan-based functional systems.
Listed from a public source - Materials maker
Marine Innovation Co., Ltd.
Ulsan, South Korea
Makes biodegradable seaweed-based packaging (containers, cups, bags, egg cartons) and seaweed foods; based in Ulsan.
Checked by us - Government agency
Massachusetts Division of Marine Fisheries
Massachusetts, United States
Issues the commercial aquaculture permit for seaweed, working with towns.
Listed from a public source - Processor
MCPI Corporation
Central Visayas, Philippines
One of the Philippines' largest carrageenan manufacturers, in northern Cebu.
Species: Cottonii (trade name, Kappaphycus)
Listed from a public source - Wild harvester and 1 more
Mendocino Sea Vegetable Company
California, United States
Wild harvests and sells about nine seaweeds from the Mendocino coast, including dulse, alaria, wild nori, sea lettuce and Irish moss.
Species: Dulse, Winged kelp, Nori, Sea lettuce, Chondrus crispus, Bladderwrack
Listed from a public source - Research body and 1 more
Merinov
Quebec, Canada
Offers applied algoculture support, including cultivation processes, site assessment and bioeconomic analysis.
Listed from a public source - Materials maker
MetaFLO
Ontario, Canada
Makes marine algae-derived biopolymers for soil stabilisation, dust control, mining and water treatment.
Checked by us - Government agency
Ministère de l'Agriculture, des Pêcheries et de l'Alimentation du Québec (MAPAQ)
Quebec, Canada
Quebec ministry responsible for fisheries and aquaculture, including seaweed farming; publishes the Pêches et Aquaculture bulletin.
Listed from a public source - Government agency
Ministry of Agriculture and Rural Affairs, Fishery Administration (China)
Beijing, China
National fisheries authority; China's official seaweed figures come from its China Fishery Statistical Yearbook.
Species: Kombu, Nori, Gracilaria
Listed from a public source - Government agency
Ministry of Industry (Indonesia)
Jakarta, Indonesia
Supports seaweed processing factories, including helping inactive factories restart (2024).
Listed from a public source - Government agency
Ministry of Marine Affairs and Fisheries (Indonesia)
Jakarta, Indonesia
Indonesia's fisheries ministry; publishes seaweed production data and set a target of 14.14 million tonnes by 2029.
Species: Cottonii (trade name, Kappaphycus), Gracilaria
Checked by us - Government agency
Ministry of Oceans and Fisheries (Korea)
Sejong, South Korea
Korea's ocean and fisheries ministry: designates Gim Industry Promotion Zones under the Gim Industry Act, funds them, and reports gim exports (US$1.13 billion in 2025).
Species: Nori
Listed from a public source - Farm and 1 more
Monterey Bay Seaweeds
California, United States
Land-based seaweed farm at Moss Landing Marine Laboratories growing dulse, sea lettuce, sea grapes and ogo, sold fresh to chefs.
Species: Dulse, Sea lettuce, Sea grapes, Gracilaria, Nori, Codium
Checked by us - Research body
Moss Landing Marine Laboratories
California, United States
Marine lab that developed low-cost bull kelp aquaculture methods with state kelp funding, and hosts a land-based seaweed farm.
Species: Bull kelp
Listed from a public source - Nursery or seed producer and 1 more
Mothers of Millions
Alaska, United States
Mobile kelp hatchery supplying seeded string to Alaska farmers, with mobile kelp processing and a community kelp farm in Resurrection Bay.
Checked by us - Farm and 3 more
Naas Foods
British Columbia, Canada
Indigenous-owned business in Tofino that wild harvests and farms kelp and sells kelp flakes and seasonings.
Species: Bull kelp, Giant kelp
Checked by us - Association or cooperative
National Federation of Fisheries Cooperative Associations (Zengyoren)
Tokyo, Japan
National federation of fisheries cooperatives; its nori business council reports the co-operative sales of dried nori each season (for example 4.84 billion sheets in the 2022 season).
Species: Nori
Listed from a public source - Association or cooperative
National Federation of Fisheries Cooperatives (Suhyup)
Seoul, South Korea
National federation of Korea's fisheries cooperatives; supports gim exporters as one of the export support bodies.
Species: Nori
Listed from a public source - Government agency and 1 more
National Fisheries Development Board (India)
Telangana, India
National board that supports fisheries development, including seaweed; took part in the October 2026 seaweed review at Mandapam.
Listed from a public source - Research body and 1 more
National Institute of Fisheries Science (Korea)
Busan, South Korea
Government fisheries research institute headquartered in Busan; funds and carries out seaweed research, including on farmed Undaria.
Species: Wakame
Listed from a public source - Research body and 1 more
National Research and Innovation Agency (BRIN)
National, Indonesia
National research agency; reviews seaweed farming research and works on an International Tropical Seaweed Research Center in Lombok.
Species: Cottonii (trade name, Kappaphycus)
Listed from a public source - Research body
National Research Council Canada
National, Canada
Describes research in seaweed cultivation, biotechnology, genetic resources and sustainability.
Listed from a public source - Research body and 1 more
National Sea Grant Seaweed Hub
National, United States
Network of Sea Grant seaweed extension specialists; publishes the State of the States report on US seaweed aquaculture.
Listed from a public source - Government agency
New Hampshire Fish and Game Department
New Hampshire, United States
Issues leases for shellfish, seaweed and finfish aquaculture in New Hampshire.
Listed from a public source - Research body and 1 more
New Hampshire Sea Grant
New Hampshire, United States
Sea Grant programme that contributed the New Hampshire seaweed section of the State of the States report.
Listed from a public source - Research body and 1 more
New York Sea Grant
New York, United States
Sea Grant programme that contributed the New York seaweed section of the State of the States report.
Listed from a public source - Government agency
New York State Department of Environmental Conservation
New York, United States
Lead regulator for seaweed farms in New York; the first commercial farm was permitted in August 2023.
Listed from a public source - Association or cooperative
Newfoundland Aquaculture Industry Association
Newfoundland and Labrador, Canada
Industry association whose spring 2025 newsletter featured seaweed aquaculture; runs the Cold Harvest conference.
Listed from a public source - Farm
NL Seaweed Inc.
Newfoundland and Labrador, Canada
Partner in seaweed nursery research for a planned Connaigre Peninsula seaweed farm (report November 2025).
Listed from a public source - Materials maker
Noriware
National, United States
Develops compostable seaweed-based resins.
Listed from a public source - Wild harvester and 1 more
North Atlantic Organics Ltd.
Prince Edward Island, Canada
Describes harvesting storm-tossed sea plants around PEI for agricultural products.
Listed from a public source - Research body and 1 more
North Island College, CARTI
British Columbia, Canada
Applied research on seaweed, a seaweed skills program with micro-credentials, and co-host of the Pacific Seaweed Summit (May 2026).
Checked by us - Wild harvester and 1 more
North Pacific Kelp
British Columbia, Canada
Wild harvests kelp and dulse; food and soap
Species: Giant kelp, Horsetail kelp, Dulse
Checked by us - Government agency
Nova Scotia Department of Fisheries and Aquaculture
Nova Scotia, Canada
Licenses aquaculture sites, including marine plants, and publishes the issued sites, options and rockweed decisions; has a marine plants advisor.
Species: Rockweed
Checked by us - Farm
Ocean Era (formerly Kampachi Farms)
Hawaii, United States
Grows native Hawaiian seaweeds and sea grapes at NELHA in Kona, and develops fish farming based on seaweed-eating fish.
Species: Sea grapes, Gracilaria, Sea lettuce
Listed from a public source - Wild harvester
Ocean Harvest Sea Vegetable Company
California, United States
Wild harvests nine sea vegetables on the Mendocino coast from April to August.
Listed from a public source - Processor and 1 more
Ocean's Balance
Maine, United States
Seaweed ingredient producer working with farmed Maine kelp: bulk flakes, granules and powders, retail furikake and wellness blends, private label and carrageenan replacement.
Species: Dulse, Nori, Sea lettuce, Chondrus crispus, Sugar kelp, Rockweed, Bladderwrack
Checked by us - Product maker
Ocean's Halo
California, United States
Seaweed snack and food brand based in Burlingame.
Listed from a public source - Non-profit or support organisation and 2 more
OceansAlaska
Alaska, United States
Non-profit shellfish hatchery near Ketchikan that also runs a demonstration kelp farm and kelp workshops.
Checked by us - Research body
Okinawa Institute of Science and Technology (OIST)
Okinawa, Japan
Research university that decoded the genome of Okinawa mozuku to support the island's mozuku farming.
Species: Okinawa mozuku
Listed from a public source - Farm and 1 more
Olakai Hawaii (Marine AgriFuture)
Hawaii, United States
Grows ogo (limu) and sea asparagus in saltwater ponds in Hawaii, and makes sea asparagus foods.
Species: Gracilaria
Checked by us - Government agency
Oregon Department of State Lands
Oregon, United States
Issues special use leases or licences for farms on state waterways in Oregon.
Listed from a public source - Research body and 1 more
Oregon Sea Grant
Oregon, United States
Sea Grant programme that contributed the Oregon seaweed section of the State of the States report.
Listed from a public source - Research body
Oregon State University
Oregon, United States
Publishes information on dulse cultivation research and a university-developed strain.
Species: Dulse
Checked by us - Farm
Pacific Sea Farms
Washington, United States
Describes cultivating sugar kelp and shellfish off Vashon Island.
Species: Sugar kelp
Listed from a public source - Association or cooperative
Pacific Seaweed Industry Association
British Columbia, Canada
Industry association: awareness, education, advocacy
Listed from a public source - Wild harvester
Pacific Wildcraft
California, United States
Family wild harvester founded in 2000, selling through its website.
Listed from a public source - Farm
PEI Mussel Farms Inc
Nova Scotia, Canada
Mussel farm with a Nova Scotia site licensed for shellfish and marine plants.
Listed from a public source - Non-profit or support organisation and 1 more
People in Need Philippines
National, Philippines
Non-profit that trains seaweed farmers to improve carrageenan quality and livelihoods.
Species: Cottonii (trade name, Kappaphycus)
Listed from a public source - Materials maker and 1 more
PhyCo Technologies Inc.
British Columbia, Canada
Develops compostable plastic alternatives for farming made from seaweed; grows seaweed with Indigenous Nations
Checked by us - Processor
PT Algalindo Perdana
National, Indonesia
Makes kappa, iota and lambda carrageenan and konjac; exhibited at Fi Europe 2024.
Species: Cottonii (trade name, Kappaphycus)
Listed from a public source - Processor
PT Amarta Carrageenan Indonesia
National, Indonesia
Makes refined and semi-refined carrageenan (kappa and iota).
Species: Cottonii (trade name, Kappaphycus)
Checked by us - Trader or exporter and 1 more
PT Asia Sejahtera Mina Tbk
National, Indonesia
Listed seaweed company supplying seaweed for food, medicine, fertiliser and as raw material for carrageenan, agar and alginate.
Listed from a public source - Trader or exporter
PT Bantimurung Indah
South Sulawesi, Indonesia
Makassar seaweed business that took part in the 2023 Indonesia Australia seaweed forum.
Listed from a public source - Processor
PT Hongxin
National, Indonesia
Indonesian carrageenan plant of Green Fresh Marine Science; design capacity 4,300 tonnes of carrageenan a year (end 2023).
Species: Cottonii (trade name, Kappaphycus)
Listed from a public source - Processor and 1 more
PT Indoflora Cipta Mandiri
East Java, Indonesia
Processes seaweed into carrageenan and agar and makes retail brands; founded 1999.
Species: Cottonii (trade name, Kappaphycus), Gracilaria
Listed from a public source - Trader or exporter
PT Jaringan Sumber Daya (JASUDA)
South Sulawesi, Indonesia
Makassar seaweed business that took part in the 2023 Indonesia Australia seaweed forum.
Listed from a public source - Processor
PT Surya Indoalgas
Sidoarjo, East Java, Indonesia
Describes manufacturing agar powder from Gracilaria seaweed.
Species: Gracilaria
Listed from a public source - Non-profit or support organisation and 2 more
Puget Sound Restoration Fund
Washington, United States
Cultures native kelps at a conservation hatchery for research and restoration.
Species: Bull kelp, Sugar kelp
Checked by us - Product maker and 1 more
Pulmuone
North Jeolla, South Korea
Food company building a land-based seaweed research and seed centre at Saemangeum under a Ministry of Oceans and Fisheries project.
Listed from a public source - Processor
Qingdao Bright Moon Seaweed Group
Shandong, China
One of the world's largest seaweed bioproduct makers: more than 16,000 tonnes of alginate a year, over 40% of China's market and over 30% of the world's, plus fucoidan and high-purity sodium alginate.
Species: Kombu
Listed from a public source - Processor
Qingdao Gather Great Ocean Algae Industry Group
Shandong, China
Makes alginate, carrageenan and agar; described as China's second largest seaweed processor; bought Australian Kelp Producers and a South Australian seaweed licence.
Listed from a public source - Processor and 1 more
Qingdao Haida Biology Group
Shandong, China
Makes seaweed polysaccharides and other functional ingredients; named a national manufacturing single-product champion; exports to more than 80 countries.
Listed from a public source - Non-profit or support organisation
Reef Check Foundation
California, United States
Co-manages the Mendocino Kelp Forest Restoration Project with the state and monitors kelp, invertebrates and fish.
Species: Bull kelp
Checked by us - Government agency
Regional District of Mount Waddington
British Columbia, Canada
Commissioned the 2024 Seaweed Industry Development Plan and in 2025 sought a strategic framework for a kelp farming pilot, co-chaired with the Quatsino First Nation.
Checked by us - Government agency
Rhode Island Coastal Resources Management Council
Rhode Island, United States
Issues shellfish and seaweed leases on state submerged land in Rhode Island.
Listed from a public source - Research body and 1 more
Rhode Island Sea Grant
Rhode Island, United States
Sea Grant programme that contributed the Rhode Island seaweed section of the State of the States report.
Listed from a public source - Processor and 2 more
Riken Food
Iwate, Japan
Seaweed food company in the Iwate seaweed conservation and breeding consortium (agreement March 2026) to breed better wakame and kombu strains.
Species: Wakame, Kombu
Listed from a public source - Wild harvester
Rising Tide Sea Vegetables
California, United States
Wild harvester since 1981 selling nori, kombu, sea palm and Fucus.
Species: Nori, Bladderwrack
Listed from a public source - Farm
Royal Hawaiian Sea Farms
Hawaii, United States
Tank culture of seaweed in Hawaii, including ogo (Gracilaria).
Species: Gracilaria
Listed from a public source - Farm and 1 more
Royal Ocean Kelp
Alaska, United States
Farms sugar kelp in Prince William Sound from local seed; sells fresh kelp in Cordova and dried kelp flakes.
Species: Sugar kelp
Checked by us - Government agency
Sabah Fisheries Department
Sabah, Malaysia
State fisheries department that has run seaweed farming in Semporna since 1980 and reports Sabah's output (about 225,000 tonnes in 2023).
Species: Cottonii (trade name, Kappaphycus)
Listed from a public source - Farm and 1 more
Sea Forest (Seaforest)
British Columbia, Canada
Cultivates and harvests Pacific kelp; sells food products (noodles, purée, seasonings, pasta) and kelp fertilisers.
Checked by us - Farm and 1 more
Sea Quester Farms
Alaska, United States
State agriculture listing describes bull-kelp cultivation and kelp products.
Species: Bull kelp
Listed from a public source - Farm and 1 more
SEA VEGETABLE COMPANY
Aki, Kochi, Japan
Grows aonori and nori on land and tests offshore seaweed farming at more than 30 sites across Japan; based in Kochi.
Species: Nori
Checked by us - Farm and 1 more
Sea6 Energy Pvt. Ltd.
Bangalore, India
Describes mechanized seaweed farming and conversion of seaweed biomass into products, with cultivation operations in Indonesia.
Checked by us - Product maker
Seabiosis
Quebec, Canada
Makes seaweed foods such as pestos, salads and marinated seaweed in the Gaspé; founded 2016.
Listed from a public source - Product maker and 1 more
SeaChange Biochemistry Inc.
Nova Scotia, Canada
Makes seaweed-derived bioactive ingredients for skincare and health using its own extraction process.
Checked by us - Materials maker
Seacork Studio
British Columbia, Canada
Makes compostable acoustic panels from seaweed washed up on Vancouver Island beaches; founded 2024.
Listed from a public source - Processor
SEADLING
Kota Kinabalu, Sabah, Malaysia
Describes fermentation and processing of seaweed into functional ingredients.
Listed from a public source - Research body and 1 more
SEAFDEC Aquaculture Department
Western Visayas, Philippines
Regional aquaculture research centre that publishes seaweed farming research and runs the Aquatic News Index on the seaweed industry.
Species: Cottonii (trade name, Kappaphycus)
Checked by us - Product maker
Seaflora
British Columbia, Canada
Skincare made from hand harvested wild seaweed
Checked by us - Materials maker
Seafoam Materials
British Columbia, Canada
Makes carbon-storing building insulation from a seaweed-based binder and upcycled paper and wood fibre.
Checked by us - Farm and 1 more
Seagrove Kelp Co.
Alaska, United States
Runs a kelp farm and nursery in Doyle Bay near Craig, Prince of Wales Island, growing ribbon, sugar and bull kelp, plus an oyster farm.
Species: Winged kelp, Sugar kelp, Bull kelp
Checked by us - Research body and 1 more
SEAMEO BIOTROP
West Java, Indonesia
Southeast Asian regional centre for tropical biology; hosted a 2024 expert discussion on seaweed tissue culture and cultivation networks.
Listed from a public source - Association or cooperative
Seaweed Industry Association of the Philippines (SIAP)
Central Visayas, Philippines
Non-profit association of seaweed farmers, traders, processors and exporters; estimates 700,000 hectares farmable, of which 8% is used.
Species: Cottonii (trade name, Kappaphycus)
Listed from a public source - Farm and 2 more
Shandong Homey Aquatic Development
Shandong, China
Rongcheng seafood company founded in 1993 selling kelp and other seaweed products alongside sea cucumber and fish.
Species: Kombu
Listed from a public source - Processor
Shandong Jiejing Group Corporation
Rizhao, Shandong, China
Describes alginate manufacturing and extraction of seaweed-derived ingredients.
Checked by us - Processor
SNAP Natural & Alginate Products Pvt. Ltd.
Ranipet, Tamil Nadu, India
Makes alginate from Sargassum and carrageenan from cottonii, plus seaweed extracts for farms, aquaculture and feed; Tamil Nadu.
Species: Sargassum, Cottonii (trade name, Kappaphycus)
Checked by us - Farm and 3 more
SolSea
Washington, United States
Tank culture of Turkish towel, dulse and sea lettuce at NOAA's Manchester station; makes skincare (SEAME) and supplies seaweed for research, feeds and fertilisers.
Species: Turkish towel, Dulse, Sea lettuce, Sugar kelp, Bull kelp
Listed from a public source - Farm and 3 more
Springtide Seaweed
Maine, United States
Seaweed nursery, farm and processor in Gouldsboro and Sorrento, Maine: seed for several species, open-water dulse, custom milling, pellets, powders and flakes.
Species: Dulse
Checked by us - Research body and 1 more
Stony Brook University, School of Marine and Atmospheric Sciences
New York, United States
Tested sites for seaweed farming in New York; its Southampton Marine Station hatchery produces kelp spools.
Species: Sugar kelp, Gracilaria
Listed from a public source - Farm and 1 more
Sunken Seaweed
California, United States
Grows dulse and sea lettuce on land at Humboldt Bay with Hog Island Oyster Co., and bull kelp in the bay; sells to chefs, ranchers and farmers.
Species: Dulse, Sea lettuce, Bull kelp
Listed from a public source - Materials maker
Sway
California, United States
Makes compostable seaweed-based packaging: shipping polybags and retail handle bags.
Checked by us - Farm and 1 more
Symbrosia
Hawaii, United States
Grows red seaweed and makes SeaGraze, an organic livestock feed additive marketed to reduce methane; has worked in Hawaii and now Indonesia.
Species: Limu kohu
Checked by us - Farm
Tenon Aquaculture Ltd.
Nova Scotia, Canada
Held a 2024 provincial option to farm sugar kelp, horsetail kelp and sea lettuce in Tatamagouche Bay.
Species: Sugar kelp, Horsetail kelp, Sea lettuce
Listed from a public source - Wild harvester and 1 more
Tidal Organics
Nova Scotia, Canada
Describes harvesting and processing rockweed in Nova Scotia for agricultural seaweed meal.
Species: Rockweed
Listed from a public source - First Nation or Indigenous enterprise
Tsawout First Nation
British Columbia, Canada
Shareholder in Cascadia Seaweed; James Island farm
Listed from a public source - Wild harvester and 1 more
Un Océan de saveurs
Quebec, Canada
Describes hand-harvested seaweeds and sells seaweed foods and seasonings.
Species: Sea lettuce, Nori, Sugar kelp
Listed from a public source - Research body
Université Laval
Quebec, Canada
Co-leads research on Arctic kelp forests and seaweed biodiversity around Cambridge Bay, Nunavut, with the Canadian Museum of Nature.
Listed from a public source - Research body
Université Sainte-Anne
Nova Scotia, Canada
Province lists institutional sugar-kelp aquaculture site 1457 at Petit de Grat.
Species: Sugar kelp
Listed from a public source - Research body
Universiti Malaysia Sabah
Sabah, Malaysia
University publishing research on Sabah's seaweed sector, including seedling quality, disease and farm economics.
Species: Cottonii (trade name, Kappaphycus)
Listed from a public source - Research body
University of California, Santa Barbara
California, United States
Kelp research, including where and when kelp restoration is most likely to succeed, with state funding.
Species: Giant kelp
Listed from a public source - Research body
University of Maine
Maine, United States
Describes applied seaweed research in nursery development, cultivation, breeding and restoration.
Checked by us - Research body and 1 more
University of New Brunswick
New Brunswick, Canada
Lists an aquaculture course that includes seaweed culture.
Listed from a public source - Research body and 1 more
University of New Hampshire
New Hampshire, United States
Ran the two New Hampshire farms that deployed and sold sugar kelp, including an offshore project funded by the Department of Energy.
Species: Sugar kelp
Listed from a public source - Government agency
Washington Department of Natural Resources
Washington, United States
Leases state-owned aquatic lands for seaweed and shellfish farms in Washington.
Checked by us - Research body and 1 more
Washington Sea Grant
Washington, United States
Sea Grant programme with seaweed extension work in Washington.
Listed from a public source - Nursery or seed producer and 1 more
West Coast Kelp
British Columbia, Canada
Kelp seed production and advice
Listed from a public source - Wild harvester and 2 more
West Coast Marine Bio-Processing Corp. (Kelpgrow)
British Columbia, Canada
Harvests and processes giant kelp (Macrocystis) into the Kelpgrow line of plant growth products, made since 2002.
Species: Giant kelp
Listed from a public source - Farm
Wild Heart Sea Farm
Nova Scotia, Canada
Sea farm holding two Nova Scotia sites licensed for shellfish and marine plants.
Listed from a public source - Research body and 1 more
Woods Hole Sea Grant
Massachusetts, United States
Sea Grant programme that contributed the Massachusetts seaweed section of the State of the States report.
Listed from a public source - Farm and 1 more
Xunshan Group
Shandong, China
Rongcheng company described in 2012 as the world's largest brown seaweed producer, extracting alginate, iodine, mannitol, fucoidan and seaweed fertiliser.
Species: Kombu
Listed from a public source - Product maker
Yamamoto Noriten
Tokyo, Japan
Nori maker founded in 1849 in Nihonbashi, known for seasoned nori.
Species: Nori
Listed from a public source - Product maker and 1 more
Yamamotoyama
Tokyo, Japan
Tea and nori company (founded 1690; nori since 1947) that develops, sells, imports and exports nori products.
Species: Nori
Listed from a public source - Research body and 1 more
Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences
Shandong, China
National mariculture research institute in Qingdao working on seaweed breeding and germplasm; has long run kelp farming training.
Species: Kombu, Sea lettuce
Listed from a public source
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