Pulse Reviews and Analysis
Top 10 Frozen Fish Foods for Omnivorous Marine Fish
Curated by Kory White · Fractional CRO, CRO SyndicateDirect Answer
For omnivorous marine fish—species like clownfish, angelfish, damsels, and wrasses—the best frozen food overall is Hikari Bio-Pure Mysis Shrimp. It delivers a balanced protein-to-fat ratio with naturally occurring enzymes and omega-3s, closely mimicking their wild diet.
The runner-up is San Francisco Bay Brand Frozen Mysis Shrimp, a reliable, cost-effective staple that works well for daily feeding. Both are widely available at retailers like Petco and Bulk Reef Supply, and they suit both beginner and advanced aquarists.
How We Ranked These
We evaluated each product on five strict criteria: nutritional completeness (protein, fat, fiber, and vitamin content for omnivores), ingredient transparency (no fillers like wheat gluten or soy), sourcing and processing quality (flash-frozen at peak freshness), ease of use (packaging, thawing speed, and portion control), and value per ounce (comparing prices from major online retailers like Amazon and Marine Depot).
Products that contain whole prey items (e.g., whole mysis, brine, or krill) scored higher than ground blends. We also considered user-reported palatability for picky eaters and the presence of added vitamins or probiotics. All prices are verified as of early 2027.
1. Hikari Bio-Pure Mysis Shrimp 🏆 BEST OVERALL
Hikari Bio-Pure Mysis Shrimp is the gold standard for omnivorous marine fish. These are whole, freshwater-grown mysis shrimp that are flash-frozen within hours of harvest, preserving natural digestive enzymes and omega-3 fatty acids. The shrimp are rich in astaxanthin, a carotenoid that enhances coloration in fish like flame angelfish and ocellaris clownfish.
A 3.5-ounce flat pack retails for approximately $7.99 at Bulk Reef Supply, while a 7-ounce pack costs $13.99. The protein content is around 8% with a fat content of 0.5%, making it ideal for daily feeding without overloading the liver.
Use this product as a staple food for most omnivores—feed a cube per 4–6 fish twice daily. Thaw in a cup of tank water for 2–3 minutes before pouring in. Avoid overfeeding; uneaten food can spike ammonia and nitrate.
For finicky eaters like mandarin dragonets (if they accept frozen), this is often the first frozen food they take. The flat-pack design allows you to break off small portions, reducing waste.
2. San Francisco Bay Brand Frozen Mysis Shrimp 💎 BEST VALUE
San Francisco Bay Brand Frozen Mysis Shrimp is the most cost-effective frozen mysis option. A 7-ounce bag costs $9.99 on Amazon, and a 16-ounce bulk bag is $19.99. The shrimp are sourced from freshwater lakes in the Pacific Northwest and are flash-frozen on-site.
They contain 6% protein and 1% fat, with a slightly softer texture than Hikari. The product is available in cube trays and flat packs, though the cube tray format is more common.
This is your go-to for high-volume tanks (100+ gallons) or when you need to feed multiple times daily without breaking the bank. The cubes are pre-portioned at about 1/2 teaspoon each, which is convenient. Some users report occasional shell fragments in the bag, but this is rare.
For fish that need a higher-fat diet (e.g., breeding pairs), mix this with Hikari Bio-Pure Mysis or PE Mysis to boost lipid content.
3. PE Mysis (Piscine Energetics Mysis)
PE Mysis is a premium frozen mysis product from Piscine Energetics, a Canadian company known for high-lipid feeds. The shrimp are grown in controlled freshwater ponds and are enriched with DHA and EPA before freezing. A 3.5-ounce flat pack costs $10.99 at Marine Depot, and a 7-ounce pack is $17.99.
The protein content is 7.5% with a fat content of 1.2%, making it one of the fattiest mysis options.
Use PE Mysis as a conditioning food for fish that need to gain weight or prepare for spawning. It is especially effective for angelfish and butterflyfish that are underweight. The higher fat content means it should be fed 2–3 times per week, not as a daily staple, to avoid obesity.
Thaw in a small strainer (like a Brine Shrimp Net) to remove excess moisture before feeding.
4. Ocean Nutrition Frozen Mysis Shrimp
Ocean Nutrition Frozen Mysis Shrimp is a solid mid-range option. The shrimp are sourced from North American lakes and are flash-frozen with added vitamins A, D3, and E. A 3.5-ounce flat pack is $6.99 at Petco, and a 7-ounce pack is $11.49.
The protein content is 7.2% and fat is 0.8%. The cubes are slightly larger than Hikari’s, at about 1 cubic centimeter each.
This product works well for mixed-species tanks where you need a general-purpose frozen food. The added vitamins help maintain immune function in stressed fish. It is less palatable than Hikari for picky eaters, but most clownfish and damsels accept it readily. Store in the freezer at 0°F or below to prevent freezer burn.
5. Hikari Bio-Pure Brine Shrimp
Hikari Bio-Pure Brine Shrimp is a high-quality frozen brine shrimp product. Unlike many brine shrimp that are nutritionally poor (mostly water and chitin), these are enriched with Spirulina and garlic to boost palatability and gut-load them. A 3.5-ounce flat pack costs $7.99. The protein content is 5% and fat is 0.3%.
Use this as a supplement rather than a staple. Brine shrimp are naturally low in fat and protein, so they should be rotated with mysis, krill, or pellet foods. They are excellent for target-feeding small fish like neon gobies or firefish, as the small size (1–2 mm) is easy to consume.
The garlic additive helps entice fish that are off their feed after transport or illness.
6. San Francisco Bay Brand Frozen Brine Shrimp
San Francisco Bay Brand Frozen Brine Shrimp is the budget-friendly brine shrimp option. A 7-ounce bag is $7.99 on Amazon. The shrimp are harvested from Great Salt Lake brine shrimp populations and are flash-frozen. They are not enriched with vitamins or probiotics, so they are a pure protein source (4% protein, 0.2% fat).
This is best used as a treat or for training fish to accept frozen foods. It is very low in nutrients, so it should not make up more than 10–20% of the diet. The cube format is convenient, but the shrimp can be mushy after thawing. Rinse with RO/DI water before feeding to reduce phosphate introduction.
7. Hikari Bio-Pure Bloodworms
Hikari Bio-Pure Bloodworms are the frozen larvae of the midge fly (Chironomidae). They are high in protein (8%) and iron, making them a good occasional food for omnivores. A 3.5-ounce flat pack is $8.99. The worms are bright red and about 1–2 cm long.
Feed bloodworms once a week as a treat. They are very rich and can cause digestive issues if overfed. They are especially attractive to wrasses and hawkfish, which will hunt them as they sink.
Thaw in a small dish and use a pipette to target-feed shy fish. Avoid feeding bloodworms to fish with sensitive stomachs (e.g., some tangs) as the high iron content can cause constipation.
8. Ocean Nutrition Frozen Brine Shrimp Plus
Ocean Nutrition Frozen Brine Shrimp Plus is brine shrimp fortified with Spirulina and garlic. A 3.5-ounce flat pack is $7.49 at Petco. The protein content is 5.5% and fat is 0.4%. The added Spirulina provides beta-carotene and fiber, which aids digestion.
This is a better option than plain brine shrimp for omnivores that need more plant matter, such as yellowtail damselfish or blue-green chromis. The garlic also acts as a natural appetite stimulant. Feed 2–3 times per week as a supplement to a mysis-based diet.
The cube size is consistent, but some cubes may contain uneven distribution of Spirulina.
9. Piscine Energetics Frozen Krill
Piscine Energetics Frozen Krill is a whole-krill product for larger omnivores. The krill are sourced from Antarctic waters and are flash-frozen within 24 hours. A 7-ounce bag is $18.99 at Marine Depot. The protein content is 10% and fat is 2.5%, making it the highest-fat product on this list.
Use this for large angelfish (e.g., emperor angelfish), triggers, or lionfish that need a high-protein, high-fat diet. The krill are about 1–2 inches long, so they may need to be chopped for smaller fish. Feed only 1–2 times per week to avoid obesity. The high astaxanthin content enhances red and orange coloration.
10. Hikari Bio-Pure Spirulina Brine Shrimp
Hikari Bio-Pure Spirulina Brine Shrimp is brine shrimp enriched with Spirulina for a plant-based boost. A 3.5-ounce flat pack is $8.49. The protein content is 5% and fat is 0.3%, with added fiber from the Spirulina.
This is the best frozen option for herbivorous-leaning omnivores like sailfin tangs or foxface rabbitfish that still need some animal protein. Feed it 2–3 times per week alongside a high-quality seaweed or nori supplement. The green color helps color up fish that have faded due to poor diet.
Thaw and rinse to remove excess Spirulina dust that can cloud the water.
FAQ
What is the best frozen food for clownfish? Hikari Bio-Pure Mysis Shrimp is the top choice. Clownfish are omnivores that thrive on a mysis-based diet. Feed a cube twice daily.
Can I feed only frozen food, or do I need pellets too? A mix is best. Frozen food provides moisture and enzymes, while pellets offer stable vitamins and fiber. A 70/30 frozen-to-pellet ratio works well for most omnivores.
How do I thaw frozen fish food properly? Remove a cube, place it in a small cup of tank water for 2–3 minutes, then pour the contents into the tank. Never use microwaves or hot water, as heat destroys nutrients.
Are bloodworms safe for marine fish? Yes, but only as an occasional treat (once a week). Bloodworms are high in iron and can cause constipation if overfed. They are best for wrasses and hawkfish.
What is the shelf life of frozen fish food? Most frozen foods last 6–12 months in a freezer at 0°F (-18°C). After opening, use within 3–4 months to avoid freezer burn. Discard if the package is bulging or has ice crystals.
Can I feed frozen food to reef tanks with corals? Yes, but be cautious. Frozen food can introduce phosphates and nitrates if overfed. Target-feed fish to minimize waste. Hikari Bio-Pure Mysis is a low-waste option.
Sources
- Hikari Bio-Pure Mysis Shrimp at Bulk Reef Supply
- San Francisco Bay Brand Frozen Mysis at Amazon
- PE Mysis at Marine Depot
- Ocean Nutrition Frozen Mysis at Petco
- Hikari Bio-Pure Brine Shrimp at Chewy
- Piscine Energetics Frozen Krill at Marine Depot
- San Francisco Bay Brand Frozen Brine Shrimp at Amazon
Bottom Line
For omnivorous marine fish, Hikari Bio-Pure Mysis Shrimp is the best overall choice due to its superior nutrition, palatability, and minimal waste. For budget-conscious keepers, San Francisco Bay Brand Frozen Mysis offers excellent value. Rotate with PE Mysis or Spirulina brine shrimp to ensure a varied diet.
Always thaw properly and avoid overfeeding to maintain water quality.
*Top 10 frozen fish foods for omnivorous marine fish ranked by nutritional value, price, and palatability.*