Top 10 Frozen Fish Foods for Omnivorous Marine Fish in 2027

1. Hikari Bio-Pure Mysis Shrimp

This ranks first because it pairs whole freshwater-grown mysis with the cleanest nutrition profile on the list: roughly 8% protein against just 0.5% fat, safe for twice-daily feeding without liver overload. The shrimp are flash-frozen within hours of harvest, preserving digestive enzymes and omega-3 fatty acids. Natural astaxanthin deepens color in flame angelfish and ocellaris clownfish. A 3.5-ounce flat pack runs about $7.99 at Bulk Reef Supply; 7 ounces is $13.99.

This is the staple for keepers running mixed omnivore tanks who want one food to cover clownfish, damsels, and wrasses. Feed one cube per four to six fish, thawed in tank water for two to three minutes. You pay roughly 20% more per ounce than the San Francisco Bay Brand mysis below it, and the flat pack demands you break off portions rather than pop out pre-measured cubes. Picky eaters usually take it first.

2. San Francisco Bay Brand Frozen Mysis Shrimp

Second place goes to the cheapest credible mysis per ounce: $9.99 for a 7-ounce bag and $19.99 for a 16-ounce bulk bag on Amazon, roughly half the cost of the Hikari flat pack. The shrimp come from Pacific Northwest freshwater lakes and are flash-frozen on site. Analysis lands near 6% protein and 1% fat, with a softer texture than Hikari. Cube trays portion at about half a teaspoon each.

This is for 100-gallon-plus systems and anyone feeding three or four times a day, where the Hikari price becomes real money. You trade away a point of protein and some texture integrity, and occasional shell fragments turn up in bulk bags. Breeding pairs needing lipid density should get this mixed with PE Mysis rather than fed alone. Pre-portioned cubes make it easier to dose consistently than the flat pack above.

3. PE Mysis

Third position reflects a specialist rather than a staple: at 1.2% fat against 7.5% protein, this is the fattiest mysis here, too rich for daily use. Piscine Energetics raises the shrimp in controlled freshwater ponds and enriches them with DHA and EPA before freezing. Pricing is the steepest of the three mysis options at $10.99 for 3.5 ounces and $17.99 for 7 ounces at Marine Depot.

Buy this for underweight angelfish and butterflyfish, or to condition a pair before spawning. Fed two or three times weekly it does what neither mysis above it can; fed daily it makes fish obese. Thaw in a brine shrimp net or strainer to shed excess moisture. If your fish are already at healthy weight, the Hikari or San Francisco Bay mysis costs less and suits everyday feeding better.

4. Ocean Nutrition Frozen Mysis Shrimp

Fourth because it undercuts Hikari on price while adding vitamins, but loses on palatability. A 3.5-ounce flat pack is $6.99 at Petco and 7 ounces is $11.49, the lowest flat-pack price among the mysis products here. Protein sits at 7.2% with 0.8% fat, and the North American lake-sourced shrimp are flash-frozen with added vitamins A, D3, and E. Cubes measure roughly one cubic centimeter, slightly larger than Hikari's.

This suits mixed-species tanks needing one general-purpose frozen food, and the vitamin fortification helps stressed or newly shipped fish hold immune function. Fussy feeders take it less readily than the Hikari mysis at the top of this list, which is the main tradeoff for the lower price. Clownfish and damsels accept it without coaxing. Store at 0°F or colder; the larger cubes freezer-burn faster once the pack is opened.

5. Hikari Bio-Pure Brine Shrimp

Fifth marks the drop from staple to supplement: brine shrimp carry only 5% protein and 0.3% fat, well under every mysis above. Hikari offsets the deficit by enriching with spirulina and gut-loading with garlic, which lifts palatability sharply over plain brine. A 3.5-ounce flat pack costs $7.99, the same as the Hikari mysis despite thinner nutrition. Individual shrimp run 1 to 2 mm.

The small particle size makes this the right tool for target-feeding neon gobies, firefish, and other small-mouthed fish that choke on mysis. Garlic makes it the food to reach for when a fish is off its feed after shipping or illness. It cannot carry a diet on its own — rotate it against mysis, krill, or pellets. Against the plain San Francisco Bay brine below, the enrichment justifies the price gap.

6. San Francisco Bay Brand Frozen Brine Shrimp

Sixth on price alone: $7.99 for a full 7-ounce bag on Amazon, roughly half the per-ounce cost of enriched brine. The shrimp are harvested from Great Salt Lake populations and flash-frozen, but they are not enriched with vitamins or probiotics. Nutrition is the thinnest here at 4% protein and 0.2% fat. Cubes thaw quickly and are pre-portioned for convenience.

Use this to train fish onto frozen food or as an occasional treat, capped at 10 to 20% of the diet. Everything the Hikari brine above it adds — spirulina, garlic, appetite stimulation — is absent, and the shrimp go mushy after thawing. Rinse with RO/DI water first to keep phosphate out of a reef system. The low cost only makes sense if you are already feeding a mysis-based staple alongside it.

7. Hikari Bio-Pure Bloodworms

Seventh because the nutrition is strong but the feeding window is narrow. These frozen Chironomidae midge larvae hit 8% protein — matching the top-ranked mysis — and carry high iron. A 3.5-ounce flat pack is $8.99. The worms are bright red and about 1 to 2 cm long, sinking slowly enough that mid-water fish intercept them. Richness is the limiting factor, not quality.

Feed once a week only; more than that risks digestive trouble, and the iron load can constipate tangs and other sensitive-stomached fish. Wrasses and hawkfish hunt them aggressively as they drift down, which makes bloodworms useful for coaxing shy or newly added specimens. Thaw in a dish and target-feed with a pipette. Unlike the brine shrimp ranked above, this cannot be fed several times weekly without consequence.

8. Ocean Nutrition Frozen Brine Shrimp Plus

Eighth for being the cheapest fortified brine shrimp at $7.49 per 3.5-ounce flat pack at Petco, undercutting the Hikari enriched version. Spirulina and garlic push protein to 5.5% and fat to 0.4%, both marginally above plain brine. The spirulina contributes beta-carotene and fiber that aids digestion. Cube sizing is consistent, though spirulina distribution across cubes is not always even.

This targets omnivores that lean plant-side — yellowtail damselfish, blue-green chromis — better than unfortified brine can. The garlic works as an appetite stimulant for hesitant feeders. Feed two or three times weekly over a mysis base rather than as the main food. Against the Hikari brine at rank five, you save fifty cents but accept less reliable spirulina content in any given cube.

9. Piscine Energetics Frozen Krill

Ninth because the richest food on this list is also the least broadly usable: 10% protein and 2.5% fat, the highest of any product here. The krill are sourced from Antarctic waters and flash-frozen within 24 hours of harvest. A 7-ounce bag runs $18.99 at Marine Depot, the priciest per-ounce entry. Whole krill measure 1 to 2 inches, and heavy astaxanthin content drives red and orange coloration.

This is for large angelfish such as emperors, plus triggers and lionfish that need serious protein and fat. Smaller-mouthed omnivores need the krill chopped first, which is real prep work. Feed once or twice weekly at most or fish put on fat quickly. Where the mysis products at the top of this list can be daily staples, this is a large-fish conditioning food and priced accordingly.

10. Hikari Bio-Pure Spirulina Brine Shrimp

Tenth because the plant-forward formulation serves the narrowest slice of omnivores. Brine shrimp enriched with spirulina land at 5% protein and 0.3% fat, with added fiber from the algae. A 3.5-ounce flat pack costs $8.49, a premium over both the plain and the Ocean Nutrition fortified brine. The green pigment measurably restores color in fish faded by a poor diet.

Sailfin tangs, foxface rabbitfish, and other herbivore-leaning omnivores that still need animal protein are the actual audience. Pair it with nori or seaweed sheets two or three times weekly rather than treating it as a complete food. Thaw and rinse first — loose spirulina dust clouds the water column and adds nutrient load. Anyone keeping only true omnivores will get more from the mysis options above at similar or lower cost.

How we ranked these

We scored every product on five axes: nutritional completeness for omnivores (protein, fat, fiber, vitamins), ingredient transparency with no wheat gluten or soy fillers, sourcing and processing quality measured by flash-freezing at harvest, ease of use covering packaging and thawing, and value per ounce checked against Amazon, Petco, Bulk Reef Supply, and Marine Depot listings. Whole prey items outranked ground blends. Prices verified early 2027.

We deliberately ignored brand loyalty, packaging design, and Amazon star averages, which reward shipping speed more than food quality. We skipped freeze-dried and pellet lines entirely, since this list covers frozen only and the moisture and enzyme profiles are not comparable. We also set aside coral and filter-feeder foods, strictly carnivore diets, and any product without published guaranteed analysis numbers we could verify against a manufacturer page.

What to look for

Match fat content to feeding frequency, not to price. Hikari Bio-Pure Mysis at roughly 8% protein and 0.5% fat is built for twice-daily staple feeding. PE Mysis at 1.2% fat and Piscine Energetics Krill at 2.5% are conditioning foods for underweight or spawning fish, fed two or three times weekly. Format matters too: flat packs let you snap off small portions, while cube trays lock you into fixed doses.

The common mistake is treating brine shrimp as a staple. Plain San Francisco Bay Brand brine runs about 4% protein and 0.2% fat, mostly water and chitin, and should stay under 20% of the diet. Buyers also overfeed because a cube looks tiny, then chase the resulting phosphate and nitrate spike. Feed one cube per four to six fish, thaw in tank water, and rinse before adding.

Related questions

How much frozen food should I feed per day?

Roughly one cube per four to six fish, twice daily, with mysis as the staple. Cubes run about half a teaspoon each. Everything should be eaten within two or three minutes. Uneaten food breaks down into ammonia and nitrate, so cut the portion if you see food settling on the sand or getting pulled into the overflow.

Should I mix pellets with frozen food?

Yes. A roughly 70/30 frozen-to-pellet ratio suits most omnivores. Frozen food supplies moisture and intact digestive enzymes that dry food lacks, while pellets carry stabilized vitamins and fiber that survive storage better. Rotating both also keeps fish willing to eat dry food, which matters when you travel and someone else is feeding the tank.

Which frozen food improves color the fastest?

Foods rich in astaxanthin. Hikari Bio-Pure Mysis carries it naturally and deepens reds and oranges in flame angelfish and ocellaris clownfish. Piscine Energetics Krill is even higher in astaxanthin but also 2.5% fat, so limit it to once or twice weekly. Spirulina-enriched brine adds beta-carotene and helps green and yellow tones in tangs.

Why won't my new fish eat frozen food?

Newly shipped or recently ill fish often refuse food for several days. Garlic-enriched options like Hikari Bio-Pure Brine Shrimp or Ocean Nutrition Brine Shrimp Plus work as appetite stimulants. Target-feed with a pipette so the food reaches the fish instead of the current. Small 1 to 2 mm brine shrimp are the easiest first bite for gobies and firefish.

Is frozen food safe in a reef tank with corals?

Yes, with portion discipline. The risk is nutrient export, not the food itself: overfeeding drives phosphate and nitrate up, which fuels algae and browns out coral coloration. Target-feed fish rather than broadcasting, rinse thawed food in RO/DI water first, and choose lower-waste options like Hikari Bio-Pure Mysis that fish consume before it scatters.

Do bloodworms belong in a marine diet?

Only as a weekly treat. Frozen midge fly larvae run about 8% protein and are high in iron, which makes them rich enough to cause digestive trouble when overfed. Wrasses and hawkfish chase them enthusiastically as they sink. Skip them for sensitive-stomach fish such as some tangs, where the iron load can trigger constipation.

What is the difference between flat packs and cube trays?

Flat packs are a frozen sheet you snap portions from, so you control dose precisely and waste less in small tanks. Cube trays are pre-measured at roughly half a teaspoon each, which is faster for larger systems and multiple daily feedings. San Francisco Bay Brand ships mostly in cubes; Hikari and PE Mysis favor flat packs.

Which product suits a herbivorous-leaning omnivore?

Hikari Bio-Pure Spirulina Brine Shrimp, around 5% protein with added fiber from the spirulina. It fits sailfin tangs and foxface rabbitfish that still need some animal protein. Feed two or three times weekly alongside dried nori or seaweed sheets. Rinse before feeding so loose spirulina dust does not cloud the water column.

FAQ

What is the best frozen food for clownfish?

Hikari Bio-Pure Mysis Shrimp. Clownfish are omnivores that do well on a mysis-based staple, and the whole shrimp deliver balanced protein with low fat suitable for twice-daily feeding. Offer one cube per four to six fish. San Francisco Bay Brand mysis is the cheaper substitute if you are feeding several tanks or a large system.

How do I thaw frozen fish food properly?

Drop the cube into a small cup of tank water and wait two or three minutes, then pour the contents in. Never microwave it and never use hot water, since heat destroys the enzymes and vitamins you paid for. For high-fat foods like PE Mysis, strain in a brine shrimp net to shed excess moisture before feeding.

What is the shelf life of frozen fish food?

Six to twelve months in a freezer held at 0°F or below. Once opened, use within three or four months before freezer burn degrades texture and palatability. Discard any package that is bulging or packed with large ice crystals, both signs it partially thawed in transit or during a power interruption and refroze.

Is PE Mysis worth the extra money?

For conditioning, yes. At roughly 7.5% protein and 1.2% fat with added DHA and EPA, it puts weight on underweight angelfish and butterflyfish and prepares breeding pairs to spawn. At about $10.99 for 3.5 ounces it costs more than alternatives, and the fat load means two or three feedings weekly rather than daily staple use.

Can I feed only frozen food?

You can, but rotation works better. A single frozen item, especially brine shrimp, leaves gaps in the nutritional profile. Build the diet on mysis, add spirulina-enriched brine for plant matter, use krill or bloodworms as occasional richness, and keep a quality pellet in the mix for stable vitamins and easier feeding while you are away.

Why is my brine shrimp mushy after thawing?

Brine shrimp are mostly water and chitin, so they break down faster than mysis once thawed. Budget lines like San Francisco Bay Brand frozen brine soften noticeably. Thaw only what you will feed immediately, never refreeze, and rinse with RO/DI water to reduce the phosphate that leaches out of the packing liquid into your tank.

Which frozen food is best for large angelfish and triggers?

Piscine Energetics Frozen Krill, sourced from Antarctic waters at roughly 10% protein and 2.5% fat. The whole krill run one to two inches, so chop them for anything smaller than an emperor angelfish. Feed once or twice weekly only; the fat content causes obesity in a fish getting it daily. Astaxanthin deepens red and orange pigment.

Do I need to rinse frozen food before feeding?

For brine shrimp and spirulina-enriched products, yes. The packing liquid carries dissolved phosphate, and loose spirulina dust clouds the water. Rinse in a fine net with RO/DI water. For whole mysis fed to a lightly stocked tank with strong export, rinsing matters less, though it never hurts if you are fighting an algae problem.

What causes shell fragments in the bag?

Harvest and processing variance. San Francisco Bay Brand mysis occasionally shows fragments, which is uncommon and harmless since fish pass the chitin. If it bothers you, the flat-pack format lets you inspect portions as you break them off. Premium lines like Hikari and PE Mysis run cleaner because they are pond-raised rather than wild-lake harvested.

Where should I store frozen food?

In a dedicated chest or upright freezer at 0°F or below, not the door of a kitchen refrigerator freezer where temperature swings every time it opens. Keep packages sealed inside a zip bag to slow freezer burn. Do not let a flat pack partially thaw on the counter and go back in; portion what you need and return the rest immediately.

Sources

• https://www.hikariusa.com/frozen_folder/mysis_shrimp.html
• https://www.hikariusa.com/frozen_folder/spirulina_brine_shrimp.html
• https://www.mysis.com/frozen/
• https://www.bulkreefsupply.com/hikari-bio-pure-frozen-mysis-shrimp.html
• https://www.saltwateraquarium.com/frozen-mysis-shrimp-fish-food-30-cubes-3-5-oz-san-francisco-bay-brand/
• https://www.saltwateraquarium.com/frozen-brine-shrimp-plus-70-cubes-7-oz-ocean-nutrition/
• https://www.petco.com/shop/en/petcostore/product/ocean-nutrition-frozen-mysis-shrimp
• https://www.whitlynaquatics.com/products/san-francisco-bay-brand-frozen-food-frozen-brine-shrimp-3-5oz-cubes

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