Macroalgae Market

How big is Macroalgae Market in 2026?

Between 2026 and 2036, a 7.5% CAGR is expected to lift macroalgae market valuation to USD 22.7 billion, building on a 2026 baseline of USD 11.0 billion after recording USD 10.2 billion in 2025.

Coastal mariculture cooperatives and marine biorefineries are scaling seeded rope cultivation to satisfy food-grade hydrocolloid demand and foliar crop biostimulant orders without depleting wild kelp beds. In its 2026 State of World Fisheries and Aquaculture report, the Food and Agriculture Organization of the United Nations documented that global farmed algae output reached 38.9 million tonnes in wet weight for the 2024 reference year, led by 38.8 million tonnes of marine macroalgae [1]. Following a 2025 baseline of USD 10.2 billion, global macroalgae market valuation is expected to total USD 11.0 billion in 2026. By 2036, a 7.5% CAGR is predicted to carry the industry to USD 22.7 billion, yielding an incremental USD 11.7 billion in decadal market value. Rhodophyta is forecast to capture 58.9% of taxonomic group demand during 2026 among processors manufacturing refined seaweed hydrocolloid extracts, whereas warming surface waters and epiphyte fouling pressure shallow tropical farm yields.

Key Market Trends & Insights

• By taxonomic group: Rhodophyta is forecast to capture 58.9% during 2026 owing to intensive tropical farming of carrageenan-bearing Eucheuma and Kappaphycus as well as temperate Pyropia nori sheets.
• By cultivation method: Offshore Rope & Longline Aquaculture is projected to hold 53.7% for 2026 driven by hatchery-seeded longlines that deliver predictable seasonal biomass without rocky-shore harvesting quotas.
• By end use: Human Food & Hydrocolloid Extraction is expected to command 60.7% in 2026 backed by dairy and meat-binding applications for carrageenan and sodium alginate.
• By processing form: Baled dried thalli below 18% moisture that enable low-cost container shipping from island farms to extraction mills place Sun-Dried & Mechanically Dehydrated Raw Seaweed at an estimated 35.9% share during 2026.

Regional Highlights

• Archipelagic and Pacific mariculture momentum: Semi-refined carrageenan milling in Indonesia drives an 8.8% annual expansion through 2036, outpacing South Korean seasoned laver exports (8.4%) and Chilean kelp biorefining (8.1%).
• Pacific and North Atlantic kelp trajectory: Federal offshore kelp permitting in the USA supports a 6.9% yearly gain through 2036, while Norwegian fjord longlines register 6.7% and Japanese culinary demand posts 6.4%.

Market Size & Forecast

Table 1: Marine Macroalgae Market Size and Ten-Year Forecast Trajectory, 2025 to 2036

Metric	Value
2025 Market Size	USD 10.2 billion
Estimated Market Size in 2026	USD 11.0 billion
Projected Market Size by 2036	USD 22.7 billion
CAGR, 2026 to 2036	7.5%
Added Market Value, 2026 to 2036	USD 11.7 billion

Tighter raw seaweed export supplies in Southeast Asia and rising unit values for seasoned edible sheets in East Asia are lifting global traded prices per kilogram. In April 2026, FAO GLOBEFISH reported in its inaugural Quarterly Species Analysis on Seaweed that although world seaweed and agar-agar export volumes eased 4.4% in January through September 2025, total export value climbed 9.4% as average global export prices rose from USD 3.92 to USD 4.48 per kilogram [2]. Because of this price dispersion between bulk dried raw bales and refined extracts, downstream processors of cultivated marine macroalgae biomass are building extraction and cold-press facilities closer to coastal landing ports. Suppliers that secure multi-origin tropical red and cold-water brown macroalgae contracts can insulate food and agricultural buyers from regional El Niño harvest dips.

Wet-Harvest Biomass and Dry-Bale Conversion Sizing

Table 2: Marine Wet-Weight Harvests and Dry-Bale Refinery Realization for Macroalgae (USD billion, million tonnes, and USD/tonne), 2025 to 2036

Metric	2025	2026	2036
Market size (USD billion)	10.2	11.0	22.7
Commercial wet macroalgae harvest (million tonnes)	39.5 to 41.2	40.8 to 42.6	56.0 to 61.5
Dehydrated & processed dry-weight equivalent (million tonnes)	4.4 to 4.8	4.6 to 5.0	6.8 to 7.6
Average commercial realization per dry-weight tonne (USD)	2,120 to 2,310	2,200 to 2,390	2,980 to 3,340

Operational note: Biomass and dry-weight ranges reconcile FAO FishStat marine seaweed wet-weight harvests against 8:1 to 10:1 solar and mechanical dehydration ratios and hydrocolloid extraction yields.

Freshly harvested marine macroalgae contains 80% to 90% water by weight and begins fermenting within 24 hours unless coastal cooperatives dry the fronds or acid-stabilize the wet slurry. Furthermore, hydrocolloid refineries wash and alkali-treat dried red Kappaphycus and Eucheuma bales to isolate food-grade carrageenan stabilizers with tailored kappa and iota gel strengths.

Per Capita & Biorefinery Processing Sizing

Table 3: Extraction Mill Realization and Cultivated Biomass Share for Macroalgae, 2025 to 2036

Metric	2025	2026	2036
World population (billion)	8.2	8.3	9.0
Market value per 1,000 people (USD)	1,243.9	1,325.3	2,522.2
Annual valuation per commercial extraction & processing plant (USD million)	14.5 to 17.2	15.4 to 18.3	26.5 to 31.8
Aquaculture-origin share of commercial biomass (%)	96.2% to 97.0%	96.5% to 97.2%	97.5% to 98.4%

Table 4: Phycocolloid and Taxonomic Valuation Benchmarks in the Macroalgae Sector, 2026

Metric	Value	Institutional Reference Basis
Market size, 2026	USD 11.0 billion	2026 global macroalgae valuation baseline
Rhodophyta (red macroalgae) valuation, 2026	USD 6.5 billion	58.9% taxonomic group segment allocation
Offshore rope & longline aquaculture valuation, 2026	USD 5.9 billion	53.7% cultivation method segment allocation
Human food & hydrocolloid extraction valuation, 2026	USD 6.7 billion	60.7% end-use segment allocation

Multi-product marine biorefineries valorize both the water-soluble polysaccharide fraction and the residual cellulose pulp to lift revenue per harvested tonne of kelp and red weed. Whilst food formulators purchase refined Gracilaria and Gelidium powders for bacteriological and culinary agar gels, agricultural input blenders convert cold-pressed brown kelp extracts into abiotic-stress biostimulants.

Analyst Perspective

"Commercial value creation in the macroalgae sector is shifting from raw sun-dried commodity export bales toward electrified hydrocolloid extraction and CE-marked agricultural biostimulants. Processors that combine multi-hemisphere kelp and red-seaweed sourcing with low-emission extraction will secure preferred supply contracts with multinational food and crop-input groups."

- Nandini Roy Choudhury, Client Partner - Food & Marine Ingredients, Future Market Insights.

How is the macroalgae market segmented?

The macroalgae market is segmented by taxonomic group, cultivation method, end use, processing form, and region. In 2026, Rhodophyta is projected at 58.9%, Offshore Rope & Longline Aquaculture at 53.7%, Human Food & Hydrocolloid Extraction at 60.7%, and Sun-Dried & Mechanically Dehydrated Raw Seaweed at 35.9%.

By taxonomic group: Rhodophyta, Phaeophyceae, and Chlorophyta.

By cultivation method: Offshore Rope & Longline Aquaculture, and Wild Intertidal Mechanical Harvest.

By end use: Human Food & Hydrocolloid Extraction, Ruminant Methane-Reducing Feed & Biofertilizers, and Biopackaging & Cosmetics.

By processing form: Sun-Dried & Mechanically Dehydrated Raw Seaweed, Refined Hydrocolloid Powder Extracts, Liquid Cold-Pressed Biostimulant Concentrates, and Roasted & Seasoned Retail Sheets.

Why does Rhodophyta lead the taxonomic group category?

Rhodophyta is forecast to capture 58.9% of taxonomic group valuation during 2026, enabled by phycocolloid refining.

Table 5: Global Macroalgae Demand Split by Botanical Phylum (percentage share), 2026

Taxonomic Group	Share (2026)
Rhodophyta	58.9%
Other Segments Combined	41.1%*
Total	100.0%

*Note: Combined share of Phaeophyceae brown kelps and Chlorophyta green seaweeds in 2026.

Table 6: Leading Red-Seaweed Phylum and Global Macroalgae Expansion Rate, 2026 to 2036

Metric	Value
Global CAGR (2026 to 2036)	7.5%
Leading Segment	Rhodophyta

Red macroalgae species synthesize sulfated galactans including carrageenan in Kappaphycus alvarezii and Eucheuma denticulatum as well as agar in Gracilaria that cannot be replicated by brown kelps or green Ulva seaweeds. Beyond industrial hydrocolloids, red Pyropia (laver/gim) commands the highest unit export prices in edible retail snacks while bromoform-rich Asparagopsis anchors livestock methane trials across functional microalgae and macroalgae extracts.

• A 58.9% share of taxonomic group valuation is forecast for Rhodophyta in 2026 due to its dual role in tropical carrageenan refining and East Asian roasted laver sheets.
• In 2026, Tate & Lyle PLC (following its combination with CP Kelco) commercialized GENU SMART red-seaweed carrageenan utilizing patented cation control to deliver cold solubility and tailored gelling temperatures in dairy and soft-gel capsule formulations [3].

Why does Offshore Rope & Longline Aquaculture define the largest cultivation method segment?

Offshore Rope & Longline Aquaculture is projected to hold 53.7% of cultivation method demand for 2026, owing to hatchery seeding.

Tensioned polypropylene longlines and submerged catenary grids seeded in onshore hatcheries allow marine farmers to cultivate Saccharina and Macrocystis in deeper, nutrient-rich currents away from crowded coastal bays. Moving lines offshore reduces herbivore grazing and warm-water Ice-Ice bacterial bleaching while scaling offshore commercial seaweed cultivation without disturbing wild rocky-intertidal habitats.

• Within cultivation methods, a 53.7% valuation share is estimated for Offshore Rope & Longline Aquaculture in 2026 owing to mechanized seeded-twine deployment and harvest vessel efficiencies.
• In September 2026, the California Coastal Commission unanimously approved consistency certification for Ocean Rainforest's 2,000-acre commercial offshore giant kelp (Macrocystis pyrifera) farm four miles off Ventura County with an annual production capacity of 6,000 wet tons [4].

What keeps Human Food & Hydrocolloid Extraction ahead by end use?

Human Food & Hydrocolloid Extraction is expected to generate 60.7% of end use market value in 2026, backed by texturizer contracts.

Dairy desserts and plant-based cheese analogues as well as cooked poultry deli meats rely on trace additions of 0.1% to 0.5% carrageenan or sodium alginate to prevent whey syneresis and bind moisture during slicing. Meanwhile, agricultural input formulators represent the fastest-growing secondary outlet as growers apply foliar kelp extracts with agricultural crop biostimulant inputs to improve drought and heat tolerance.

• Across end-use categories, 60.7% of 2026 market value is expected to come from Human Food & Hydrocolloid Extraction because multi-year food-ingredient supply contracts and retail nori snacks anchor baseline demand.
• In April 2026, Cargill completed a EUR 25 million Mechanical Vapor Recompression modernization at its Baupte carrageenan and biopolymer extraction plant in France, cutting total site CO2 emissions by 45% (13,700 metric tons annually) [5].

Why does Sun-Dried & Mechanically Dehydrated Raw Seaweed lead the processing form category?

Sun-Dried & Mechanically Dehydrated Raw Seaweed is estimated at 35.9% of processing form valuation in 2026, supported by container logistics.

Solar drying on elevated coastal racks and rotary thermal dehydration reduce raw harvested seaweed moisture below 18% to 22%, which stabilizes the polysaccharides for six-to-twelve-month warehouse storage and international container shipping. Once compressed dry bales arrive at refining hubs in Europe or North America, processors extract brown-kelp fucoidan and alginate biopolymers or mill food-grade carrageenan powders.

• Within processing forms, 35.9% of 2026 valuation is projected for Sun-Dried & Mechanically Dehydrated Raw Seaweed since dried raw bales constitute the primary globally traded feedstock for hydrocolloid mills.
• An October 2025 peer-reviewed study in Scientific Reports characterizing kappa-carrageenan extracted from sun-dried tropical Kappaphycus alvarezii biomass confirmed strong biopolymer integrity and antibacterial efficacy for food and biomedical hydrocolloid processing [6].

What are the drivers, restraints, and opportunities in the macroalgae market?

Clean-label vegan texturizer reformulation and CE-marked crop biostimulant approvals are projected to expand macroalgae extraction volumes, whereas ruminant dry-matter intake hurdles restrain feed uptake and biopolymer co-product valorization creates margin opportunities.

• Driver: European Union Fertilising Products Regulation CE-marking of Ascophyllum nodosum extracts and vegan gelatin replacement in gummies and capsules accelerate processor orders.
• Restraint: Warming coastal surface temperatures shorten East Asian winter cultivation windows while high bromoform inclusion in Asparagopsis cattle rations can reduce dry-matter feed intake.
• Opportunity: Co-fermenting spent algal extraction pulp into PLA biopolymers and optimizing low-dose red-seaweed rumen hydrogenotrophic pathways generate high-margin circular revenue.

Growth Analysis and Future Potential: Qualitative Demand Catalysts

Harmonized agricultural biostimulant rules across the European Union and North America are transforming cold-water brown kelp and rockweed extracts from niche specialty sprays into mainstream row-crop and orchard inputs. Bioactive laminarins and fucoidans extracted from Ascophyllum nodosum and Macrocystis pyrifera stimulate root branching and help crops tolerate summer heatwaves while complementing botanical and seaweed livestock feed additives. In August 2025, Acadian Seaplants Limited announced that its Acadian Plant Health division secured its fifth CE-marked Ascophyllum nodosum biostimulant approval under the European Union Fertilising Products Regulation (FPR 2019/1009), enabling unified commercialization across all 27 EU member states [7]. Pan-European regulatory clearance removes country-by-country registration delays for seaweed extractors.

Risk Assessment of the Macroalgae Market: Operational and Formulation Friction

Formulation trade-offs in ruminant methane-mitigation feeds and climate-driven ocean temperature spikes represent the primary technical hurdles restraining rapid volume scaling. Although red Asparagopsis seaweeds strongly inhibit enteric methane in cattle, uncalibrated dietary inclusion can suppress palatability and alter rumen hydrogen fermentation. Tasmanian Institute of Agriculture researchers writing in the December 2025 issue of the Journal of Dairy Science documented that while Asparagopsis effectively inhibits ruminant methanogenesis, supplementation is frequently accompanied by a decline in dry-matter intake (DMI) and altered dihydrogen metabolism that require standardized dosing protocols [8]. Feed formulators must therefore micro-encapsulate bromoform extracts and balance iodine levels before commercial dairy herds adopt daily seaweed rations.

Commercial Opportunity Analysis: Formulation Differentiation and Value-Add Formats

Biotechnology researchers and algal biorefineries are capturing higher value per tonne by pairing low-dose red seaweed rumen modulation with zero-waste biopolymer and protein co-product extraction. Rather than discarding spent cell-wall fiber after alkali hydrocolloid extraction, processors are blending algal co-products into compostable packaging and alternative marine protein ingredients. In November 2025, a multi-omics trial from UC Berkeley and UC Davis published in Microbiome showed that 1% Asparagopsis armata feed supplementation in lactating Holstein cows reduced methane production by up to 60% and increased feed efficiency by up to 74% by activating hydrogenotrophic Duodenibacillus bacteria [9]. Validated feed-efficiency gains strengthen the commercial case for cultivated red seaweed additives.

Macroalgae Market by Country (2026 to 2036)

South Sulawesi mariculture expansion puts Indonesia on track for an 8.8% yearly growth clip through 2036, outpacing South Korea (8.4%).

Coastal mariculture expansion is topped by Indonesia on an 8.8% yearly growth trajectory until 2036 above South Korea (8.4%) and Chile (8.1%), whilst the USA records 6.9% above Norway (6.7%) and Japan (6.4%). Downstream carrageenan refining in Southeast Asia and high-value gim exports from South Korea as well as offshore kelp permitting in the Americas and Nordics govern national output.

Table 7: Six-Nation Macroalgae Compound Growth Rates and Mariculture Drivers, 2026 to 2036

Country	CAGR (2026 to 2036)	Primary Growth Lever
Indonesia	8.8%	South Sulawesi Kappaphycus and Eucheuma mariculture scaling paired with domestic semi-refined carrageenan mills
South Korea	8.4%	Record Pyropia (gim) dried and seasoned laver exports with government-backed indoor land-based cultivation pilots
Chile	8.1%	Gracilaria agar aquaculture and high-sulfation Macrocystis and Lessonia alginate and fucoidan extraction
USA	6.9%	Federal offshore Macrocystis kelp farm permitting in California and OMRI-listed seaweed biostimulant adoption
Norway	6.7%	Automated offshore Saccharina latissima longline cultivation and acid-preserved kelp biorefining off Frøya
Japan	6.4%	High per-capita culinary wakame, kombu, and nori consumption supported by heat-tolerant cultivar breeding

Source: Future Market Insights analysis

Japan Macroalgae Market Outlook (2026 to 2036)

Deeply rooted culinary demand for Pyropia nori sheets and Undaria wakame as well as Saccharina kombu dashi stock makes Japan a leading global value consumer and importer of food-grade macroalgae. Because warming coastal waters along Kyushu and the Ariake Sea have shortened winter nori seeding windows, Japanese fisheries cooperatives supplement domestic coastal harvests with East Asian imports and heat-tolerant spore breeding. A September 2026 marine engineering review in the Journal of Marine Science and Engineering traced modern longline Saccharina japonica cultivation directly to Hokkaido mariculture pioneers while documenting 38.8 million tonnes of global farmed seaweed output [10]. Consistent culinary dashi and sushi sheet consumption across Japanese households and restaurants keeps domestic macroalgae revenue on a projected 6.4% yearly climb through 2036.

Key takeaway: In Japanese culinary channels, resilient retail nori and kombu demand paired with heat-tolerant cultivar breeding is projected to sustain steady domestic and imported macroalgae valuation growth.

USA Macroalgae Market Outlook (2026 to 2036)

Commercial progression of offshore kelp cultivation from small research plots to federal-waters leases in California and Alaska is building a domestic macroalgae supply chain across the United States. At the same time, specialty crop growers in California and the Pacific Northwest are adopting organic-certified giant kelp and sugar kelp biostimulants to reduce synthetic fertilizer runoff in strawberries and wine grapes. In August 2025, Ocean Rainforest launched two seaweed-based biostimulants in Santa Barbara, California-MakroBoost (Macrocystis pyrifera) and KelpShield (Saccharina latissima)-registered with the California Department of Food and Agriculture and OMRI Listed under the USDA National Organic Program [11]. New Pacific and Atlantic kelp leases are anticipated to push United States macroalgae turnover upward at 6.9% per year to 2036.

Key takeaway: In United States coastal waters, federal offshore kelp farm permitting in California and OMRI-certified biostimulant adoption are anticipated to drive domestic macroalgae expansion.

Norway Macroalgae Market Outlook (2026 to 2036)

Cold, nutrient-rich North Atlantic fjords and mechanized salmon-aquaculture vessel infrastructure position Norway as Europe's primary hub for cultivated Saccharina latissima (sugar kelp) and Alaria esculenta (winged kelp) as well as wild-harvested Laminaria hyperborea. Rather than relying on energy-intensive blast freezing after spring harvest, Norwegian kelp pioneers are deploying organic-acid silage and fermentation to stabilize wet biomass for food and salmon feed customers. In April 2025, Innovation Norway profiled Trondheim-based Seaweed Solutions AS and noted its EUR 24.5 million R&D investment on Frøya along with Bionova-backed mechanized harvesting and acid-preservation lines [12]. Broader fjord kelp concessions and organic-acid silage lines are forecast to lift Norwegian macroalgae sales by 6.7% per year through 2036 for European food and salmon-feed buyers.

Key takeaway: In Norwegian fjord concessions, Bionova bioeconomy funding and acid-stabilized offshore sugar-kelp harvesting are forecast to scale industrial biomass supply for European food and feed processors.

Indonesia Macroalgae Market Outlook (2026 to 2036)

Shallow tropical archipelagic coastlines across South Sulawesi and East Nusa Tenggara make Indonesia the world's largest exporter of red Kappaphycus and Eucheuma carrageenan seaweeds as well as Gracilaria agar biomass. National industrial policy increasingly favors domestic alkali-treated cottonii chip and semi-refined carrageenan processing over raw sun-dried bale exports. In July 2026, FAO GLOBEFISH reported that Indonesia exported 197,870 tonnes of seaweed in 2025 to represent 69% of world export volume, with 174,560 tonnes shipped to Chinese hydrocolloid processors [13]. Upgrading domestic alkali-treatment and carrageenan refineries across South Sulawesi is expected to lift Indonesian macroalgae turnover at an 8.8% annual rate to 2036 as processors capture higher export unit values.

Key takeaway: In Indonesian archipelagic provinces, massive South Sulawesi red-seaweed mariculture output and downstream domestic carrageenan refining are expected to drive the fastest national growth rate.

South Korea Macroalgae Market Outlook (2026 to 2036)

Whereas Southeast Asian producers export low-priced raw dried bales, South Korea dominates high-value processed edible seaweed trade through automated roasting and seasoning of Pyropia (gim) and Undaria (miyeok). A January 2026 study by Korea's National Institute of Fisheries Science published in Food Chemistry: X documented that South Korea ranks as the world's third-largest seaweed producer at 1,725,969 tonnes-led by 572,679 tonnes of Undaria, 551,534 tonnes of Pyropia, and 542,409 tonnes of Saccharina-with Pyropia generating 83.1% of national production value [14]. To counter shorter winter sea-cultivation windows, Korean processors are piloting indoor land-based gim tanks. Premium seasoned laver exports and land-based tank pilots are predicted to lift South Korean macroalgae revenue by 8.4% yearly to 2036.

Key takeaway: In South Korean laver processing hubs, surging overseas demand for high-margin roasted gim snacks and government-backed indoor cultivation pilots are predicted to sustain rapid export-led growth.

Chile Macroalgae Market Outlook (2026 to 2036)

Cold Humboldt Current upwellings along Chile's 4,000-kilometer Pacific coastline support the Western Hemisphere's largest macroalgae industry, combining estuarine Gracilaria chilensis (pelillo) farming in Los Lagos with managed harvesting of brown Lessonia and Macrocystis pyrifera kelps. Chilean processors supply food-grade agar and sodium alginate while scaling high-purity sulfated fucoidan extracts for biomedical and agricultural biostimulant markets. A June 2025 study led by Universidad de Concepción published in the International Journal of Biological Macromolecules characterized water-soluble fucoidans from Chilean Macrocystis pyrifera with fucose-to-mannose molar ratios of 7.7 to 17.3 and strong anticoagulant and antitumoral selectivity [15]. Biorefinery demand for Andean brown kelps is slated to expand Chilean macroalgae industry value by 8.1% annually through 2036.

Key takeaway: In Chilean coastal regions, Gracilaria agar aquaculture in Los Lagos and high-value Macrocystis fucoidan and alginate biorefining are slated to anchor strong South American market expansion.

Full report country CAGRs cover: North America; Latin America; Western Europe; Eastern Europe; East Asia; South Asia and Pacific; Middle East and Africa.

Who are the notable companies in the macroalgae market?

Acadian Seaplants Limited, Cargill, Incorporated, CP Kelco U.S., Inc., Qingdao Gather Great Ocean Algae, Ocean Rainforest Sp/F, Seaweed Energy Solutions AS, Algaia S.A., and Kerry Group plc are the notable companies in the macroalgae market.

FMI analysis indicates that competitive positioning in the global macroalgae industry divides between multinational hydrocolloid and taste-and-nutrition processors and vertically integrated North Atlantic and Pacific kelp harvesters and biorefineries. Cargill and CP Kelco (now combined with Tate & Lyle PLC) together with Kerry Group plc and China's Qingdao Gather Great Ocean Algae anchor global carrageenan and alginate texturizer supply across dairy and pharmaceutical formularies. Meanwhile, Canada's Acadian Seaplants Limited and France's Algaia S.A. (part of the JRS Group) lead science-backed Ascophyllum and Laminaria agricultural biostimulants and specialty alginates, whereas Ocean Rainforest Sp/F and Norway's Seaweed Energy Solutions AS pioneer offshore longline kelp aquaculture.

• Global Hydrocolloid & Taste-and-Nutrition Processors: Cargill and CP Kelco along with Kerry Group plc and Qingdao Gather Great Ocean Algae operate industrial carrageenan and functional food-texturizer refineries.
• Wild-Harvest Biostimulant & Biorefinery Specialists: Acadian Seaplants Limited and Algaia S.A. harvest North Atlantic rockweed and Brittany brown kelp to manufacture CE-marked crop biostimulants and bio-based packaging co-products.
• Offshore Kelp Aquaculture Pioneers: Ocean Rainforest Sp/F and Seaweed Energy Solutions AS manage hatchery spore seeding and open-ocean longline cultivation coupled with acid-stabilized or cold-pressed kelp processing across the North Atlantic and Eastern Pacific.

Competitive Benchmarking: Macroalgae Market

Table 8: Hydrocolloid Processor and Offshore Kelp Harvester Capability Matrix, 2026

Company	Marine Biomass / Harvest Access	Hydrocolloid / Extract Refining	Food & Ag Formulary Reach	Geographic Reach
Acadian Seaplants Limited	High	High	High	High
Cargill, Incorporated	Medium	High	High	High
CP Kelco U.S., Inc.	Medium	High	High	High
Qingdao Gather Great Ocean Algae	High	High	High	High
Ocean Rainforest Sp/F	High	Medium	Medium	Medium
Seaweed Energy Solutions AS	High	Medium	Medium	Medium
Algaia S.A.	High	High	High	Medium
Kerry Group plc	Medium	High	High	High

Evaluation basis: Supplier scores reflect captive offshore aquaculture or rotational wild-harvest licenses as well as industrial carrageenan and biostimulant extraction capacity. Formulary and geographic ratings reflect verified food and agricultural distribution across Europe and the Americas as well as Asia-Pacific.

Key Developments in the Macroalgae Market

• Algaia S.A. partnered with Normandy biopolymer manufacturer NaturePlast in September 2026 to blend its COPAL algal biomass co-product with polylactic acid (PLA) for bio-based packaging materials [16].
• In February 2026, Kerry Group plc posted EUR 6,758 million in 2025 group turnover and EUR 1,208 million in EBITDA (a 17.9% margin), backed by 3.0% volume expansion across its Taste and Nutrition foodservice and clean-label texturizer platforms [17].
• Ocean Rainforest Sp/F acquired a majority stake in Mexican seaweed biostimulant producer AlgaMar and achieved record harvests per meter in the Faroe Islands during 2025 to scale trans-Atlantic kelp biostimulant supply [18].

Key Players in the Macroalgae Market

Global Hydrocolloid & Taste-and-Nutrition Processors

• Cargill, Incorporated
• CP Kelco U.S., Inc.
• Kerry Group plc
• Qingdao Gather Great Ocean Algae

Wild-Harvest Biostimulant & Biorefinery Specialists

• Acadian Seaplants Limited
• Algaia S.A.

Offshore Kelp Aquaculture Pioneers

• Ocean Rainforest Sp/F
• Seaweed Energy Solutions AS

Macroalgae Market - Report Scope

Table 9: Marine Phyla and Processing Form Boundaries in the Macroalgae Study, 2026 to 2036

Coverage field	Report scope
Market breakdown	Taxonomic Group; Cultivation Method; End Use; Processing Form; Region
Quantitative Units	USD Billion
Market Definition	Includes commercial supplier market value from cultivated and wild-harvested marine macroalgae (Rhodophyta red seaweeds, Phaeophyceae brown kelps and rockweeds, and Chlorophyta green seaweeds) sold as sun-dried or dehydrated raw biomass, refined hydrocolloid powder extracts (carrageenan, alginate, and agar), liquid cold-pressed agricultural biostimulants, methane-reducing livestock feed additives, and roasted edible retail sheets. Category Scope Note: Excludes unicellular freshwater microalgae (Spirulina, Chlorella, and Haematococcus), synthetic petroleum polymers, and terrestrial plant gums (guar, xanthan, and locust bean gum).
Regions Covered	North America; Latin America; Western Europe; Eastern Europe; East Asia; South Asia and Pacific; Middle East and Africa
Countries Covered	Japan, USA, Norway, Indonesia, South Korea, Chile, and additional countries in the full report
Key Companies Covered	Acadian Seaplants Limited, Cargill, Incorporated, CP Kelco U.S., Inc., Qingdao Gather Great Ocean Algae, Ocean Rainforest Sp/F, Seaweed Energy Solutions AS, Algaia S.A., Kerry Group plc
Forecast Period	2026 to 2036
Approach	Primary and secondary research with top-down and bottom-up market triangulation.

Macroalgae Market - Research Methodology

Table 10: Wet-to-Dry Harvest Conversion and Customs Validation for Macroalgae, 2026 Edition

Method	Approach
Primary Research	Structured interviews with offshore kelp hatchery directors, carrageenan and alginate refinery managers, CE-marked biostimulant agronomists, and East Asian edible seaweed exporters across Indonesia, South Korea, Japan, Norway, Chile, and North America.
Secondary Research	Analysis of FAO SOFIA 2026 and GLOBEFISH Quarterly Seaweed reports, Cargill, Tate & Lyle (CP Kelco), Kerry Group, Acadian Seaplants, Algaia, and Ocean Rainforest disclosures, and peer-reviewed studies in Microbiome and Journal of Dairy Science.
Market Sizing and Forecasting	Top-down global marine macroalgae farm-gate and processor valuations reconciled against bottom-up wet-to-dry biomass conversion ratios and refined hydrocolloid/biostimulant yields from 2026 to 2036.
Country Forecasting Model	Econometric country projections weight coastal mariculture lease capacity, HS 1212.21 and HS 1302.31 export unit values, and domestic hydrocolloid/biostimulant refining capacity across six national markets.
Operational Benchmark Traceability	Wet-harvest biomass and dry-bale conversion indicators in Tables 2, 3, and 4 trace to FAO FishStat 2024 to 2026 datasets, GLOBEFISH trade unit values, and Indonesian Ministry of Marine Affairs and Fisheries statistics.
Data Triangulation and Validation	Demand estimates are cross-checked against HS 1212.21 and HS 1302.31 customs trade logs and hydrocolloid refinery throughput without double counting freshwater Spirulina or Chlorella microalgae.

Macroalgae Market by Segments

Macroalgae Market segmented by Taxonomic Group:

• Rhodophyta
• Phaeophyceae
• Chlorophyta

Macroalgae Market segmented by Cultivation Method:

• Offshore Rope & Longline Aquaculture
• Wild Intertidal Mechanical Harvest

Macroalgae Market segmented by End Use:

• Human Food & Hydrocolloid Extraction
• Ruminant Methane-Reducing Feed & Biofertilizers
• Biopackaging & Cosmetics

Macroalgae Market segmented by Processing Form:

• Sun-Dried & Mechanically Dehydrated Raw Seaweed
• Refined Hydrocolloid Powder Extracts
• Liquid Cold-Pressed Biostimulant Concentrates
• Roasted & Seasoned Retail Sheets

Macroalgae Market by Region

• North America
  • United States
  • Canada
• Latin America
  • Chile
  • Brazil
  • Mexico
  • Peru
• Western Europe
  • Norway
  • France
  • Ireland
  • United Kingdom
  • Spain
  • Denmark
• Eastern Europe
  • Poland
  • Russia
  • Romania
• East Asia
  • China
  • Japan
  • South Korea
• South Asia and Pacific
  • Indonesia
  • Philippines
  • Malaysia
  • Australia and New Zealand
  • India
• Middle East and Africa
  • United Republic of Tanzania
  • South Africa
  • Morocco
  • GCC Countries

Research Sources and Bibliography

• [1] Food and Agriculture Organization of the United Nations (FAO). (2026, June 08). Aquaculture production - The State of World Fisheries and Aquaculture 2026. FAO Knowledge Repository.
• [2] Food and Agriculture Organization of the United Nations (FAO). (2026, April 17). FAO GLOBEFISH launches new quarterly species analysis on seaweed. FAO GLOBEFISH News.
• [3] Tate & Lyle PLC (CP Kelco). (2026, March 10). GENU SMART Carrageenan. Tate & Lyle Ingredient Finder.
• [4] Ocean Rainforest Sp/F. (2026, September 10). Ocean Rainforest Advances U.S. Seaweed Farming With Key California Coastal Commission Approval. Ocean Rainforest News.
• [5] Cargill, Incorporated. (2026, April 13). Cargill's Baupte site cuts CO2 emissions by 45% with major process modernization. Cargill Newsroom.
• [6] Ramachandran, I., Baskaralingam, V., & Elumalai, P. (2025, October 27). Extraction and characterization of antibacterial marine polysaccharide K-Carrageenan from Kappaphycus alvarezii against multidrug-resistant wound associated bacteria. Scientific Reports, 15(1), 37446 (PubMed PMID 41145552).
• [7] Acadian Seaplants Limited (Acadian Plant Health). (2025, August 14). Acadian Expands CE-Marked Biostimulant Portfolio Across Europe. Acadian Plant Health Resources.
• [8] Ahmad, I., Rawnsley, R. P., Bowman, J. P., & Omede, A. A. (2025, December 15). Graduate Student Literature Review: Limitations in feeding red seaweed Asparagopsis species for enteric methane mitigation in ruminants. Journal of Dairy Science, 108(12), 13270-13288 (PubMed PMID 41076247).
• [9] Zhang, P., Roque, B., Romero, P., Shapiro, N., Eloe-Fadrosh, E., Kebreab, E., Diamond, S., & Hess, M. (2025, November 13). Red seaweed supplementation suppresses methanogenesis in the rumen, revealing potentially advantageous traits among hydrogenotrophic bacteria. Microbiome, 13, 231 (PMC12613782).
• [10] Huang, C., Nguyen, H. P., White, W. L., & Wang, C. M. (2026, September 26). Engineering Perspectives on Kelp (Saccharina japonica) Cultivation Structures in China: Nearshore Practices and Transition to Offshore Environments. Journal of Marine Science and Engineering, 14(19), 1794.
• [11] Ocean Rainforest Sp/F. (2025, August 22). Ocean Rainforest Launches Two Biostimulant Products in California. Ocean Rainforest News.
• [12] Innovation Norway (Innovasjon Norge). (2025, April 11). Growing sustainable biomass in the blue fields. Innovation Norway Customer Stories.
• [13] Food and Agriculture Organization of the United Nations (FAO). (2026, July 23). Indonesia-China route anchors seaweed trade despite lower volumes. FAO GLOBEFISH News.
• [14] Park, H. E., Lee, J. B., Kim, M. J., Kwon, G. Y., Lee, H. R., Kim, H. J., Kim, M. J., & Shim, K. B. (2026, January 14). Mineral content and potentially toxic elements in Pyropia spp. cultivated in Korea: Influence of harvest region, season, and drying process. Food Chemistry: X, 34, 103544 (PMC12950456).
• [15] Figueroa, F. A., Abdala-Diáz, R., Cabrera-Barjas, G., Lopez, F., Moncada-Basualto, M., et al. (2025, June 04). Latitudinal variation in chemical composition and biological activities of fucoidans from Macrocystis pyrifera (brown algae): first insights along the Chilean coast. International Journal of Biological Macromolecules, 318(Pt 1), 144978 (PubMed PMID 40480583).
• [16] Algaia S.A. (2026, September 26). Design takes center stage this fall. Algaia News & Events.
• [17] Kerry Group plc. (2026, February 17). Kerry Group preliminary results for the year ended 31 December 2025. Kerry Group Investor News.
• [18] Ocean Rainforest Sp/F. (2025, December 21). A Groundbreaking Year for Ocean Rainforest. Ocean Rainforest Blog.
• [19] Acadian Seaplants Limited (Acadian Plant Health). (2026, April 01). Sustainably Supplying the World with Seaweed. Acadian Plant Health Resources.
• [20] Goecke, F., Aakre, I., Angarita, L., Li, N., Li, X., Escobar, M. C., Cisternas, S., Wang, L., Pang, S., & Ergon, Å. (2025, June 26). Inclusion of macroalgae in the diet - a comparative survey from Norway, Chile and China. Food & Nutrition Research, 69, 10856 (PMC12255160).

This bibliography is provided for reader reference and is not exhaustive. The full report contains the complete reference list and detailed citations.

This Report Answers

• How large is the macroalgae market in 2026 and what is forecast for 2036?
• Which mariculture and clean-label texturizer trends support demand for macroalgae?
• Why does Rhodophyta lead the taxonomic group category?
• Why does Offshore Rope & Longline Aquaculture lead the cultivation method category globally?
• How do growth rates differ across Indonesia, South Korea, Chile, the USA, Norway, and Japan?
• Which leading hydrocolloid, biostimulant, and aquaculture companies supply the market today?
• What limits raw seaweed yield stability or livestock feed adoption in the macroalgae market?
• What should food and agricultural buyers evaluate before sourcing macroalgae extracts?