The Future of Fish Farms: The European Innovation Cutting Feed Costs, Curbing Pathogens, and Monetizing Waste

Key Takeaways on European Innovation

• Diets Free from Imported Soy and Overfishing: Cutting-edge projects confirm that fungal (PEKILO®) and insect meals nutritionally match conventional inputs, shielding fish farms against raw-material market volatility.
• Preventive Biosecurity over Antibiotic Dependency: Integrating biological vaccines, precision genotyping, and AI-driven diagnostics drastically curbs outbreak mortality while phasing out reliance on curative treatments.
• By-products Transformed into New Revenue Streams: Fish sludge and Recirculating Aquaculture System (RAS) effluents are upcycled into phosphorus-rich fertilizers, bioenergy (biogas), and growth substrates for high-protein organisms.
• Offshore Co-location with Wind Farms: Seaweed and bivalve farming leverage offshore wind turbine moorings, amortizing infrastructure costs and yielding biomass without requiring formulated feed.
• Circular Economy and Systemic Modernization: Deploying biodegradable nets and ropes, alongside biorefineries that extract collagen and chitosan from processing waste, underpins a profitable, climate-neutral production model.

Dawn scarcely casts its first light over the sea cages as the production manager begins his routine: evaluating the school’s feeding response, tracking dissolved oxygen via a mobile device, and projecting the cycle’s net margin. In financial statements, operating margins narrow with each passing season; squeezed between the soaring costs of aquafeed—driven by volatile prices for fishmeal and imported soy—and the latent threat of bacterial outbreaks before harvest, aquaculture profitability faces a critical juncture. Compounding this economic strain is an operational hurdle: managing settled sludge, discarded bivalve shells, and decommissioned plastic netting amid increasingly stringent environmental mandates—externalities the sector historically absorbed as an unavoidable cost of doing business.

However, this reactive paradigm is shifting: backed by the European Commission and disseminated through the CORDIS service, a consortium of 26 strategic projects funded by initiatives such as Horizon Europe, the European Maritime, Fisheries and Aquaculture Fund (EMFAF), and the LIFE Programme delivers science-based solutions directly applicable at the farm gate. This initiative targets three critical bottlenecks for finfish, shrimp, and mussel farmers: decarbonizing and lowering feed costs, neutralizing pathogens through immunoprophylaxis and advanced genomic selection, and turning environmental liabilities into profitable commercial assets. Implementing these innovations will be decisive for complying with evolving regulations and securing a competitive edge in global markets.

Future Feeds for Aquaculture: Breaking Reliance on Fishmeal and Soy

In any commercial fish farm, formulated feed accounts for 50% to 70% of total operational costs. For decades, aquaculture formulations relied on two essential pillars: pelagic wild-catch fishmeal and soybean meal; however, the production landscape has shifted drastically. Climate impacts on capture fisheries and stringent international anti-deforestation regulations have transformed these conventional inputs into a source of chronic economic volatility for farmers.

In response to this challenge, European biotechnology is driving the use of microorganisms and invertebrates as viable, large-scale alternatives. Through the AquaPekilo project, coordinated by the Finnish firm EniferBio, the incorporation of fungal single-cell protein (Pekilo mycoprotein) was successfully validated. Produced in bioreactors via the upcycling of industrial by-products, this biomass provides an amino acid profile and protein content comparable to soy, but with a substantially reduced carbon footprint, zero pressure on agricultural land, and no dependence on seasonal crop cycles. Commercial trials confirm that fish assimilate this ingredient with optimal feed conversion ratios and sustained growth rates.

In parallel, intensive insect farming has moved beyond the experimental stage to establish itself at an industrial scale. The InnovaFeed BEW 2019 initiative, led by Innovafeed in France, deployed dedicated infrastructure for processing insect larvae into protein meals and oils tailored for grow-out diets. The project not only confirmed their high zootechnical performance but also secured supply agreements with leading European feed manufacturers, proving that industrial insect production achieves cost parity with traditional raw commodities. Incorporating alternative ingredients into aquafeed enables operations to diversify formulations, stabilize production expenditures, and align with international buyers demanding certified traceability and sustainability.

Aquatic Animal Health and Precision Genetics: The Paradigm Shift Away from Antibiotics

Intervening in a bacterial outbreak only when specimens are already piping at the surface or exhibiting hemorrhagic lesions is arriving too late. Administering antibiotics in the aquatic environment entails not only steep costs and considerable logistical complexity, but also triggers immediate trade restrictions, degrades pond microbiota, and drives antimicrobial resistance on a global scale.

To address this issue at its root, scientific research prioritizes preventive immunology and advanced genetic selection. The Cure4Aqua project, coordinated by the Czech Academy of Sciences in Czechia, promotes next-generation vaccines designed against the most critical pathogens in commercial freshwater and marine species. Concurrently, the consortium applies ultra-early detection biomarkers and genotyping programs that identify families with superior natural defenses, facilitating the multiplication of genetically robust broodstock.

Along these same lines, the IGNITION project, led by the Interdisciplinary Centre of Marine and Environmental Research in Portugal, combines molecular phenotyping, genomic tools, and machine learning algorithms. The objective is precise: to predict the degree of susceptibility in batches of finfish and mollusks before they experience environmental stress events. In this way, producers can implement preventive measures—such as adjusting stocking densities or applying functional diets—avoiding reliance on emergency shock treatments.

This commitment to resilience becomes especially prominent in organic aquaculture frameworks. The EUAqua.Org project (coordinated by the University of Padua in Italy) and SelectOrganic (coordinated by Nofima in Norway) focus their research on optimizing parental breeding stocks of Atlantic salmon, rainbow trout, European seabass, and gilthead seabream. Their selective breeding schemes prioritize not only growth rates, but also immune robustness and tolerance to marine heatwaves. In this context, adopting proactive biosecurity and fish health strategies stands as the most cost-effective path to maximizing survival rates without compromising final product safety.

Zero-Waste Aquaculture: Transforming Sludge, Shells, and Nets into New Revenue Streams

Every fish farm or cultivation facility generates waste streams historically dismissed as useless liabilities: effluents laden with feed residues and feces, sludge retained by mechanical filtration systems, thousands of tons of shells from mollusk shucking, and miles of polypropylene netting deteriorated by wave action. Traditional disposal of these by-products incurs steep logistical expenses for transport and final disposal, alongside exposing operations to regulatory contingencies and environmental penalties.

Nevertheless, these materials constitute high-density concentrations of secondary raw materials of notable commercial value. In Northern Europe, the AQUAPHOENIX project, coordinated by NORCE Research in Norway, demonstrates across seven sites in Finland and Norway how to collect and stabilize aquaculture sludge to extract strategic macronutrients—principally phosphorus and nitrogen. Once processed, these components are converted into highly bioavailable agricultural fertilizers and bioenergy substrates, mitigating eutrophication across lakes and fjords.

Regarding land-based facilities, the LIFE22-ENV-IS-TERRAFORMING LIFE project, coordinated by First Water in Iceland, extends this scope to salmonid Recirculating Aquaculture Systems (RAS). The plant recovers organic sludge using advanced water recirculation technologies, blends it with livestock manure via controlled fermentation, and processes it inside mobile anaerobic digesters. The outcome delivers a two-fold return: biogas generation for on-site thermal or electrical power consumption, and sanitized organic fertilizer for the agricultural market.

Concurrently, the SAFE project, coordinated by the International Organisation for the Development of Fisheries and Aquaculture in Europe in Denmark, uses freshwater effluents and sludge as a circular cultivation base for insects, earthworms, fungi, and microalgae. The entire circuit functions under the oversight of artificial intelligence models that track water quality to discharge a purified effluent back into the natural environment. The proper valorization of sludge in Recirculating Aquaculture Systems (RAS) thus shifts from a recurring operational cost into a direct driver of productive profitability.

The upcycling of physical infrastructure undergoes a comparable transformation. European aquaculture generates roughly 490,000 tons of shells annually. Confronting this volume, the LIFE22-ENV-IT-LIFE GREENLIFE4SEAS project, led by the Polytechnic University of Bari in Italy, developed on-site mixing machinery that crushes shells and blends them with harbor-dredged sediment to manufacture paving blocks, harbor breakwaters, and coastal defense structures. To mitigate the loss of gear and microplastic shedding, initiatives such as LIFE MUSCLES (coordinated by Legambiente National Association in Italy) and BIOGEARS (led by AZTI Foundation in Spain) have developed ropes and tubular nets for mussel farming from biodegradable and compostable biopolymers. These bioplastics match the tensile strength of petroleum-based synthetics in open-sea conditions, promote spat attachment, and degrade harmlessly if lost at sea.

This valorization chain culminates with LIFE21-ENV-ES-LIFE REFISH, coordinated by Jealsa Foods in Spain. The consortium validated continuous operations within an industrial biorefinery processing 300 kg/h of discards and viscera. After treating over 45 tons of fisheries and aquaculture side-streams, the facility extracted purified protein fractions, polyunsaturated fatty acid oils, hydrolyzed collagen, technical gelatin, and chitosan for high-value formulations in nutraceutical, pharmaceutical, and agronomic applications.

Multi-Use Marine Farms and Seaweed: The Offshore Regenerative Aquaculture Revolution

The scarcity of sheltered coastal space constitutes one of the foremost bottlenecks hindering global aquaculture expansion. Deploying floating cages along the coastline generates friction with tourism activities, maritime navigation routes, and landscape conservation zones; however, venturing into the open ocean exposes aquaculture concessions to extreme hydrodynamics and prohibitive mooring expenses.

Confronting this crossroads, the European strategy commits to spatial co-location alongside large offshore wind farms. Vanguard projects such as OLAMUR, coordinated by the Institute of Marine Research in Norway, and ULTFARMS, led by the Deltares Foundation in the Netherlands, validate low trophic aquaculture (LTA) systems anchored to wind turbines across the North Sea and the Baltic Sea. Instead of financing costly standalone foundations, operators utilize turbine piles to support longlines for sugar kelp (Saccharina latissima), mussels, and oysters. This co-location not only yields marine biomass and protein without requiring freshwater or formulated feed, but bivalves and macroalgae also biofilter excess nitrogen and sequester dissolved carbon, actively regenerating the marine ecosystem.

In subtropical waters, the AquaWind initiative, coordinated by the Government of the Canary Islands in Spain, demonstrated for the first time in the Atlantic basin the feasibility of coupling fish cages to floating wind platforms, employing remote telemetry and automation to feed and monitor stocks remotely without requiring permanent crew on board.

Concurrently, the industrial scaling of macroalgae cements its economic viability. The OCEAN GARDENS project, led by Macrocarbon in Spain, envisions a 40,000 m² floating offshore facility in Gran Canaria capable of producing 300 tons of dry biomass annually at an estimated cost of barely 100 euros per ton, supplying competitive raw material for bioplastics and biofuels. In Ireland, SEAGROW, coordinated by Óir na Farraige, cultivates seaweed and scallops in Bantry Bay targeting 5,000 tons per year; at the same time, networks such as COOL BLUE BALTIC (Submariner Network for Blue Growth EWIV, Germany), ATL.A.HUB (Technological Institute of the Canary Islands), and platforms like EU4ALGAE (EABA, EurA, and s.Pro) coordinate seed hatcheries and dependable commercial supply chains. Harnessing the potential of macroalgae cultivation and integrated multi-trophic systems unlocks profitable business models where ecological processes replace feed expenditures.

This productive restructuring reaches even into urban zones. The AWARE project, coordinated by INNOVA in Italy, operates the first European aquaponic system powered by treated and reclaimed urban wastewater. By eliminating contaminants through advanced biotechnology, the loop grows commercial finfish and vegetables directly within the urban fabric, curbing transport emissions and bringing fresh protein directly to consumers.

Climate Change Adaptation and Digitalization: Artificial Intelligence Transforms Decision-Making in Aquaculture

The warming of marine and inland water bodies is no longer a theoretical projection; it is an operational reality that producers witness during every summer cycle. Plummeting dissolved oxygen saturation levels, sudden parasite outbreaks, and escalating harmful algal blooms (HABs) directly jeopardize the financial viability of farming facilities.

To equip operators with actionable mitigation tools, the ActFast project, coordinated by the University of Bologna in Italy, maps regional climate vulnerabilities and deploys early warning systems powered by continuous sensory monitoring and predictive artificial intelligence models. These platforms alert technical teams to physical-chemical or thermal anomalies with ample operational lead time to halt feeding, boost supplementary aeration, or accelerate harvest schedules. Concurrently, the OCCAM project, led by Nofima in Norway, delivers specialized carbon footprint calculators to optimize zootechnical management strategies across key species such as carp, trout, and salmon.

This technological transition equally requires skilled human capital to guarantee generational renewal. To this end, platforms like the EU Aquaculture Assistance Mechanism (managed by NTT DATA in Belgium) provide regulatory and technical guidance to producers, while the BlueAquaEdu initiative (coordinated by the Agricultural University of Athens in Greece) trains incoming specialists through interactive simulators and gamified environments focused on Recirculating Aquaculture Systems (RAS), animal welfare, and by-product valorization.

As the day draws to a close at the fish farm, the sector’s horizon takes on a renewed dimension. Settled sludge that once represented an operational liability is emerging as high-value biofertilizer for the agricultural industry; feed silos reduce reliance on maritime soy imports by integrating local microbial biomass; and subsea sensor networks monitor stocks selectively bred for disease resistance. The 26 projects unified under the European strategy confirm that the sector’s future lies not in maximizing volume at all costs, but in converting every biological constraint and production waste stream into a profitable, sustainable, and resilient competitive advantage.

Reference (open access)
European Commission. (2026). Innovation in aquaculture: A Synergy Info Pack by CORDIS. Publications Office of the European Union. https://doi.org/10.2830/7929488

Milthon Lujan

Editor at the digital magazine AquaHoy. He holds a degree in Aquaculture Biology from the National University of Santa (UNS) and a Master’s degree in Science and Innovation Management from the Polytechnic University of Valencia, with postgraduate diplomas in Business Innovation and Innovation Management. He possesses extensive experience in the aquaculture and fisheries sector, having led the Fisheries Innovation Unit of the National Program for Innovation in Fisheries and Aquaculture (PNIPA). He has served as a senior consultant in technology watch, an innovation project formulator and advisor, and a lecturer at UNS. He is a member of the Peruvian College of Biologists and was recognized by the World Aquaculture Society (WAS) in 2016 for his contribution to aquaculture.