What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Farmed fish can grow without fishmeal. A complete feed can use blends of plant proteins, agricultural and fish-processing by-products, terrestrial animal proteins, insect meal, algae, seaweed, yeast, bacteria or fungi. The right blend depends on species, life stage, digestibility, amino-acid balance, palatability, cost, supply, regulation and environmental performance. Replacing protein is only part of the job: the formula must also provide digestible energy, taurine where required, and long-chain omega-3s such as EPA and DHA.
Why fishmeal is being replaced
Fishmeal is made from fish that are rendered and dried into a concentrated protein ingredient. It has traditionally been valued for its amino-acid profile, digestibility and strong palatability, especially in feeds for carnivorous species. However, aquaculture has increasingly shifted toward feeds that use fewer whole wild-caught forage fish.
NOAA Fisheries reports that fishmeal’s share of salmon diets fell from about 70% in the 1980s to about 25% in 2017. That change reflects both economic pressure and concern about depending on finite supplies of anchovies, sardines and other small pelagic fish. A widely quoted NOAA assessment states that “fish meal and fish oil are not nutritionally required for farmed fish to grow meaning that even carnivorous fish can be fed diets containing no fish-based ingredients.” The qualification is important: fishmeal can be removed only when the replacement diet is nutritionally complete and accepted by the target species.
Fishmeal and fish oil are separate ingredients. A diet can replace fishmeal protein while still using a marine or microbial oil to supply EPA and DHA, or it can replace both with a broader combination of oils and other ingredients. Protein replacement therefore should not be treated as proof that the finished fish will have the same fatty-acid profile.
#1 Best Overall
- 🐟 MUST HAVE: When looking for the very best for your fish
- 🐟FLOATING: Perfect for any pond, lake, or large aquarium fish
- 🐟COMPLETE: Packed with protein and all the essential minerals and vitamins
- 🐟 WHAT YOU GET: Clear package of 2 pounds of clean premium floating fish food
- 🐟 WE MAKE IT RIGHT: Not only can you rest assured that all of our products are covered by Amazon’s Return Policy, on the Farm, we will always stand by our products
What a fishmeal replacement must provide
A practical alternative is not judged by crude protein percentage alone. Feed formulators need to match the nutrient supply to the fish’s species, size, growth stage and production system.
- Essential amino acids: The blend must deliver the amino acids the fish cannot make in sufficient amounts. A high-protein ingredient can still be inadequate if one or more essential amino acids are limiting.
- Digestible energy: Protein should be available for tissue growth rather than being burned as an inefficient energy source. Processing and ingredient combinations affect digestibility.
- Palatability and intake: Fish must eat the pellets consistently. Some plant and microbial ingredients have flavors, textures or soluble compounds that require processing or attractants.
- Taurine: Some carnivorous fish cannot synthesize enough taurine when marine ingredients are reduced. NOAA reports that adding taurine to plant-protein diets can complete the nutrient balance for such fish; the U.S. Food and Drug Administration approved this use in 2017.
- EPA and DHA: Replacing fishmeal does not automatically supply the long-chain omega-3 fatty acids EPA and DHA. Algae oils, fish-processing trimmings and other marine or microbial sources may be needed, depending on the desired nutrient content of the harvested fish.
- Physical quality: Pellets need suitable density, water stability, storage life and handling characteristics. An ingredient that is nutritionally sound but makes pellets crumble or leach nutrients is not a workable substitute.
Because these requirements interact, commercial feeds generally use blends rather than a one-for-one swap. There is no scientifically established universal replacement percentage for all farmed fish.
Major alternatives to fishmeal
| Alternative class | What it contributes | Important constraints | Typical role in a formulation |
|---|---|---|---|
| Plant proteins and crop by-products | Large, established supplies of protein from soy, peas, wheat gluten, corn gluten, barley, rice, canola and lupine | Amino-acid balance, digestibility, antinutritional factors, palatability and taurine requirements must be managed | Core protein component, usually blended with other ingredients |
| Terrestrial animal by-products | Concentrated protein and amino acids from poultry meal and other approved processing co-products | Regulatory eligibility, traceability, species restrictions, consistency and consumer requirements | Protein-dense complement to plant ingredients |
| Fish-processing trimmings | Meal, oil and natural attractants from heads, bones and other parts left after processing | Seasonal supply, collection logistics, freshness, contamination control and regional availability | Marine nutrition and palatability without harvesting additional whole fish |
| Insect meals | Concentrated protein from black soldier fly and other insects; potential circular use of approved by-products | Production scale, substrate rules, digestibility, nutrient consistency, cost and regulation | Emerging or expanding protein ingredient |
| Microalgae and seaweed | Protein, pigments, minerals and oils; some algae oils provide EPA and DHA | Production cost, processing, nutrient variability, scale and life-cycle impacts | Protein, functional compounds or omega-3 oil, depending on species |
| Single-cell proteins | Yeast, bacteria and fungi can provide protein and functional nutrients | Fermentation inputs, downstream processing, handling, cost, regulatory approval and life-cycle performance | Specialty or expanding protein source used in a blend |
Plant proteins and crop by-products
Plant ingredients are the most established broad category of fishmeal alternatives. NOAA lists soybeans, barley, rice, peas, canola, lupine, wheat gluten, corn gluten and other plant proteins as already used in aquafeeds. Their principal advantage is agricultural scale: supplies are available through existing crop-processing systems rather than relying on a limited marine catch.
Recommended Free Tools
Soy and other legumes
Soy protein can provide substantial protein at predictable volume, but “soy” is not a complete description of feed quality. Different soy products vary in protein concentration, fiber, soluble compounds and processing history. Formulators must account for digestibility and for antinutritional factors that can reduce nutrient use or feed intake. Pea and lupine proteins can broaden the amino-acid and supply base, but they have their own digestibility and palatability characteristics.
Gluten, cereal and oilseed proteins
Wheat gluten and corn gluten are concentrated plant proteins. Barley, rice and canola products can contribute protein and energy while making use of established crop streams. These ingredients are usually combined so that the overall amino-acid pattern is closer to the fish’s requirement. A formula may also need purified amino acids, taurine or other supplements; the specific additions depend on laboratory analysis and feeding results.
Rank #2
- Provides necessary animal and vegetable proteins
- With 35% protein, fish meal is the first ingredient and supports tissue and muscle development
- Great for Koi, Goldfish and other pond fish
- Floating pond fish food that's suitable for all seasons
- Fish oil, wheat germ meal and alfalfa meal to enhance eye, heart and cognitive functions
When plant protein works well
Plant protein is a good candidate when supply is reliable, the target species tolerates the ingredients, and processing can control digestibility and pellet quality. It is not a universal one-for-one replacement for fishmeal. The relevant question is whether a tested blend delivers the required nutrients and performance at the intended inclusion level.
Terrestrial animal by-products
Poultry meal and other processed terrestrial animal proteins can upcycle co-products that would otherwise have lower-value uses. They are protein-dense and can help supply amino acids that are difficult to balance with crops alone. Their use still requires approved sourcing, clear traceability and compliance with the rules that apply in the country and for the target species.
Evidence from a kampachi feed trial
In a NOAA-reported study, 480 juvenile kampachi were distributed among 16 tanks and fed four diets for three months. One fishmeal-free formulation used feed-grade poultry meal, wheat, soy protein concentrate and corn protein, with canola, flax and algae oils. During that study, the fishmeal-free diet matched the commercial control for the reported growth, survival, fillet yield and feed-conversion ratio.
The same report gives useful economic context: the poultry meal in the formulation cost almost 60% less than fishmeal. NOAA also noted that the algae oil was initially expensive and could become cheaper with mass production. Those figures describe that reported formulation and period; they are not a universal price or performance guarantee for every poultry meal, algae oil or fish species.
Fish-processing trimmings
Heads, frames, bones, skin and other parts left after filleting can be rendered into meal and oil. Using these trimmings recovers nutrients from fish already entering the food system and can reduce the need to harvest additional whole forage fish. NOAA notes that trimmings can also provide natural attractants that help formulated feeds achieve acceptable intake.
Rank #3
- Contains one (1) API BOTTOM FEEDER PELLETS WITH SQUID Fish Food 7.9-Ounce Container
- Includes optimal protein sources to support healthy fish and ideal growth
- Contains squid pellet, mussel, and seaweed for improved nutrition and great taste
- Formulated for easy digestion, leading to less toxic ammonia and cleaner, clearer water
- Feed as much as fish can consume in 30 minutes as bottom feeders have slower feeding habits
Trimmings are not automatically available everywhere. Their value depends on collection systems, freshness, storage, rendering capacity and the species being processed. A feed mill must also control contamination and verify the nutrient composition, because the mix of parts can change from one supply stream to another.
Insect meals
Black soldier fly and other insect meals are among the most visible emerging alternatives. Insects can convert approved by-products into concentrated biomass, fitting a circular-economy strategy. NOAA and the Food and Agriculture Organization identify insects as current or pipeline aquafeed options.
Insect meal should nevertheless be evaluated as an ingredient, not as a sustainability label. The permitted substrate on which insects are raised affects regulatory status, contaminant risk and life-cycle results. Production scale, drying and processing costs, digestibility, nutrient consistency and the target fish’s response all need verification. Neither NOAA nor FAO supports one universal insect-meal inclusion rate for every species, so a trial at the intended inclusion level is essential.
Algae, seaweed and single-cell proteins
Microalgae and algae oils
Microalgae can contribute protein, pigments, minerals and oil. Algae-derived oils are particularly important when a formulation must provide EPA and DHA, because common plant oils generally do not supply those long-chain forms in the same way. The algae species, cultivation method and extraction process determine the final nutrient profile and environmental burden.
Seaweed
Seaweeds can supply minerals, pigments and some protein or functional compounds. Their composition can vary with species, growing conditions and processing. They are more often a targeted component of a blend than a complete replacement for concentrated protein.
Yeast, bacteria and fungi
Single-cell proteins produced from yeast, bacteria or fungi can provide protein and functional nutrients without depending on a fish catch. FAO identifies these sources as important non-traditional options, while emphasizing the practical tests that determine whether they can scale: feedstock and fermentation inputs, processing, handling, storage, cost and life-cycle performance. A microbial ingredient may be nutritionally promising yet unsuitable if it cannot be produced consistently at the required volume and price.
Can farmed fish grow without fishmeal?
Yes, when the complete diet supplies all required nutrients and the fish consume it reliably. This applies even to carnivorous farmed species; the absence of fishmeal does not by itself prevent growth. The evidence is diet-specific, however. A successful fishmeal-free diet for one species, size class or production system cannot be copied unchanged to another.
The kampachi study illustrates both the possibility and the limits of the claim. The 480 juvenile fish in 16 tanks were fed four diets for three months, and the reported fishmeal-free treatment matched the commercial control for growth, survival, fillet yield and feed-conversion ratio. In a blind taste trial associated with that report, 62% of participants preferred kampachi fed the fish-free diet, 19% preferred the commercial diet and 19% could not tell a difference. Those results support the performance of that tested formulation; they do not establish that every fishmeal-free feed will produce the same farm or consumer outcome.
Is soy a good substitute for fishmeal?
Soy can be a useful component of fish feed because it is widely available and can supply concentrated plant protein. It is not, by itself, a universal substitute. The feed must be checked for essential amino-acid balance, digestibility, antinutritional factors, palatability and species tolerance. A carnivorous species may also need taurine when marine ingredients are reduced; NOAA reports that taurine supplementation with plant proteins can complete the nutrient balance in such cases, with U.S. FDA approval in 2017.
Free tools Windows power users keep installed
One-click scans. No signup required.
The practical choice is usually a blend: soy or another crop protein provides part of the protein, while poultry meal, trimmings, an insect or microbial ingredient, purified nutrients and an appropriate oil address gaps. The correct blend is determined by analyzed nutrient values and feeding results, not by the ingredient’s name.
Best Value
- Contains one (1) API BOTTOM FEEDER PELLETS WITH SQUID Fish Food 1.3-Ounce Container
- Includes optimal protein sources to support healthy fish and ideal growth
- Contains SQUID pellet, mussel, and seaweed for improved nutrition and great taste
- Formulated for easy digestion, leading to less toxic ammonia and cleaner, clearer water
- Feed as much as fish can consume in 30 minutes as bottom feeders have slower feeding habits
Which alternative is most sustainable?
There is no universally most sustainable fishmeal alternative. Sustainability depends on the entire supply chain, including what the ingredient replaces and how it is produced. FAO stresses that alternatives must be assessed for traceability and life-cycle effects because they introduce their own land, water, energy, waste and sourcing challenges.
| Decision axis | Questions to ask |
|---|---|
| Nutritional adequacy | Does the blend meet digestible amino-acid, energy, taurine, vitamin and mineral requirements for this species and life stage? |
| Palatability and intake | Do fish accept the pellets at the intended inclusion level, and does intake remain stable? |
| Growth, survival and welfare | Does a controlled feeding trial show acceptable growth, survival, feed conversion and welfare? |
| EPA and DHA | Will the feed supply and retain the required long-chain omega-3s in the harvested fish? |
| Price and supply | Is the ingredient affordable and available consistently rather than only during a short harvest or promotion? |
| Processing and storage | Can the ingredient be milled, mixed, extruded or pelleted without excessive dust, nutrient loss or spoilage? |
| Regulation and traceability | Are the source, substrate, processing aids and intended use permitted and documented in the relevant market? |
| Environmental performance | What are the land, water, energy, emissions and waste impacts, and how do they compare with the fishmeal being displaced? |
| Species and life stage | Has the ingredient been tested in the actual fish, size class and production conditions? |
A by-product can look attractive because it avoids waste, but transport, refrigeration or rendering energy can change the result. A crop protein can have a dependable supply, while its land and water footprint may matter in a particular region. An insect or microbial ingredient can use a circular feedstock, yet its drying or fermentation energy may be significant. Comparing complete life-cycle performance prevents a single “natural” or “alternative” label from deciding the question.
How to replace fishmeal in a feed program
- Define the production target. Record the fish species, life stage, expected growth rate, water temperature, farming system, harvest size and required fillet or product attributes.
- Set nutrient specifications. Establish digestible protein and energy targets, essential amino-acid requirements, taurine needs, mineral and vitamin specifications, and the desired EPA and DHA content of the finished fish.
- Map available ingredients. List local plant proteins, approved terrestrial by-products, fish trimmings, insect meals, algae or seaweed products and single-cell proteins. Document supplier, batch variability, traceability, storage requirements and regulatory status.
- Analyze and balance the blend. Use measured nutrient values rather than generic database averages. Combine ingredients to correct amino-acid and energy gaps, and add taurine or other nutrients when the species requires them.
- Protect palatability and pellet quality. Check attractants, particle size, water stability, density, drying and storage behavior. Trimmings or oils may improve acceptance, while some plant or microbial ingredients may require processing.
- Test in controlled stages. Begin with a digestibility and short palatability test, then run a growth trial at the intended inclusion level with a recognized commercial or fishmeal-containing control. Measure intake, growth, survival, feed conversion and relevant health or welfare indicators.
- Check harvested-fish nutrition. Analyze EPA and DHA retention and other product-quality measures, because the ingredient profile in the feed does not automatically predict the composition of the harvested fish.
- Verify economics and continuity. Calculate ingredient, processing, transport, storage and formulation costs. Confirm that the supply can cover the full production cycle and that a substitute is available if a by-product stream changes.
- Document compliance and review. Keep records of origin, processing, substrates, test batches and approvals. Recheck performance when a supplier, process, fish size or season changes.
Common mistakes and how to avoid them
Assuming one ingredient can replace fishmeal one-for-one
Fishmeal contributes several properties at once: protein, amino acids, digestibility and palatability. Replacing only its protein percentage can leave gaps in energy, taurine, attractants or omega-3 supply. Use a balanced blend and verify the complete diet.
Confusing protein replacement with omega-3 replacement
Plant proteins can remove marine protein while plant oils still fail to provide EPA and DHA in the needed long-chain forms. Specify the oil source separately and test the finished fish when omega-3 content matters.
Transferring results between species
A diet that worked for juvenile kampachi over three months does not automatically work for salmon, trout, shrimp or an older fish. Digestive physiology, feed intake, temperature and life stage change the result. Test the actual production animal.
Calling an ingredient sustainable without checking its supply chain
By-products, insects, algae and microbial proteins can all have environmental advantages, but none is automatically low-impact. Check feedstock, land, water, energy, transport, waste, traceability and the baseline ingredient being displaced.
Ignoring regulatory and handling requirements
Approval may depend on the country, animal species, processing method or insect substrate. Storage stability and pellet manufacturing can also determine whether a theoretically suitable ingredient works in practice. Confirm the rules and physical specifications before purchasing at scale.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteQuick Recap
What the evidence supports
- Fishmeal is not nutritionally mandatory for farmed fish, including carnivorous species, when a complete diet supplies the required nutrients.
- Plant proteins are the most established broad replacement category, but amino-acid balance, digestibility, antinutritional factors and taurine must be managed.
- Terrestrial animal by-products and fish-processing trimmings can recover nutrients and reduce dependence on whole forage fish.
- Insect meals, algae, seaweed, yeast, bacteria and fungi are viable areas of development, with scale, cost, handling, regulation and life-cycle questions still central to adoption.
- EPA and DHA require explicit attention; removing fishmeal does not automatically provide them.
- There is no universal replacement percentage or single best ingredient. The defensible choice is the blend that meets the target species’ nutritional and production requirements while offering reliable supply and acceptable life-cycle performance.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
