7 Best Frozen Foods For Saltwater Fish – 2025 Reviews & Top Picks

Gone are the days where we only feed our fish a pinch of flakes a couple of times a day. As science and nutrition information has advanced, we’ve learned more about meeting the needs of our fish. For saltwater fish, a nutrient-dense, varied diet is important for health and longevity. Frozen foods are a fantastic way to bring nutrient-rich variety to your fish’s diet without the hassle of transporting or raising live food.

We’ve found the top frozen food picks for your saltwater aquarium fish to help you make an educated decision and save you money by bringing you only the best of the best.

A Quick Comparison of Our Favorites of 2025

Rating	Image	Product	Details
Best Overall		Piscene Energetics PE Frozen Flat Pack Mysis Shrimp	Nutrient-dense Can be used to condition fish for breeding Stimulates a feeding response even in picky fish	Check Price
Best Value		Hikari Mega-Marine Algae	High in protein Formed into worm-like sticks to stimulate feeding Supports osmotic activity with minimal energy expenditure	Check Price
Premium Choice		San Francisco Bay Brand Sally’s Frozen Krill – Premium Choice	Stimulates hunting instincts Rich in omega-3 fatty acids and astaxanthin Alternative to live feeder fish and invertebrates	Check Price
		Hikari Bio-Pure Jumbo Blood Worms	5 ounces of food in 24-portion blister pack Gut-loaded for maximum nutritional payoff Rich in vitamins minerals omega fatty acids and color enhancers	Check Price
		Ocean Nutrition Formula Two	Two package sizes Can be fed as a primary diet Formulated to retain its shape as it thaws	Check Price

The 7 Best Frozen Foods for Saltwater Aquarium Fish

1. Piscene Energetics PE Frozen Flat Pack Mysis Shrimp – Best Overall

The best overall frozen food for saltwater aquarium fish is the Piscene Energetics PE Frozen Flat Pack Mysis Shrimp. This 8-ounce pack contains freshwater Mysis shrimp, but it is appropriate for saltwater fish as well. Mysis shrimp are nutrient-dense, containing almost 70% protein and over 8% fat. This food stimulates a feeding response in even the pickiest omnivorous or carnivorous fish, and it can be used to support breeding in your fish. It can be fed frozen or thawed and rinsing prior to feeding can reduce the risk of water cloudiness. Mysis shrimp are naturally rich in omega-3 fatty acids, which helps support bright color development. Since this is a flat pack, it can be difficult to portion out appropriate amounts of food at one time.

2. Hikari Mega-Marine Algae – Best Value

The best frozen food for your saltwater fish for the money is the Hikari Mega-Marine Algae, which comes in a 3.5-ounce pack containing 32 frozen cubes. The cubes are packaged in a no-touch blister pack form. This food is formulated for herbivores and omnivores, but your carnivorous fish may love it as well due to its protein content of around 75%. Within each frozen cube is formed sticks that are worm-like in appearance, stimulating hunting and feeding in your fish. It supports osmotic activity and contains a combination of vitamins and ingredients that most people cannot replicate at home. Make sure you’re feeding an appropriate amount of this food because uneaten food will lead to water cloudiness.

3. San Francisco Bay Brand Sally’s Frozen Krill – Premium Choice

The top premium choice for feeding your saltwater fish frozen food is the San Francisco Bay Brand Sally’s Frozen Krill. This food is available in three package sizes, including a 96-ounce mega pack. These krill contain around 80% protein and are appropriate for omnivores and carnivores alike. They are rich in omega-3 fatty acids and astaxanthin, both of which support color development in fish. This is a great alternative to live feeder fish and will still stimulate hunting instincts in your carnivores. This food should be thawed in room temperature or cool water before feeding, and since it comes in flat packs, it may be difficult to break off the appropriate portion size.

4. Hikari Bio-Pure Jumbo Blood Worms

The Hikari Bio-Pure Jumbo Blood Worms are available in a 3.5-ounce blister pack with 24 frozen cubes. The no-touch packaging means you never have to handle these blood worms, and they’re high in protein at almost 64%. They’re a great source of vitamins, minerals, omega fatty acids, and color enhancers, and they are gut-loaded to ensure maximum nutrition. These are larger than your average blood worm, making them ideal for larger carnivores and omnivores. Some people report allergic reactions to blood worms, so it is important to avoid handling them when possible.

5. Ocean Nutrition Formula Two

The Ocean Nutrition Formula Two frozen food is specially formulated for marine herbivores and omnivores. It is available in two package sizes and comes in blister packs of 70 cubes. It contains 75% protein, thanks to marine algae and seafood ingredients, like plankton and squid. This food can be offered as a primary food and is formulated to be fed 1–3 times per day. It is recommended to offer this food as a frozen cube because it is formulated to retain its shape as it thaws, allowing your fish to easily consume it with minimal mess. Avoid overfeeding, though, since excess food will quickly cloud the water.

6. Hikari Bio-Pure Rotifers

The Hikari Bio-Pure Rotifers are the perfect frozen food option for fry, small fish, and corals. It contains over 77% protein, as well as DHA, EPA, and bio-encapsulated multivitamins. It’s also rich in microalgae, which supports nutrient density, nutrient cycling, and clearer water. This food comes in a 1.75-ounce package of 40 mini cubes in a blister pack, allowing for no-touch handling of the food. Although these are mini cubes, they may still be too large for small fry and corals, so make sure you aren’t accidentally overfeeding by offering a full cube. Overfeeding will lead to water clouding.

7. San Francisco Bay Brand Sally’s Frozen Brine Shrimp

The San Francisco Bay Brand Sally’s Frozen Brine Shrimp are a great treat for fish of all types. This food comes in a 4-ounce flat pack of brine shrimp, which contain high levels of fatty acids, astaxanthin, natural pigments, and protein. It can stimulate a feeding response in picky and sick fish, ensuring everyone in your tank is eating well. It also stimulates brilliant color production and growth. This is a flat pack, so portioning may be difficult. This food should be thawed prior to feeding. Uneaten food will quickly cloud the water, so make sure to only feed as much as your fish can quickly eat.

Buyer’s Guide: Selecting The Best Frozen Foods For Saltwater

Choosing the Best Frozen Food for Your Saltwater Aquarium Fish

When it comes to picking the right frozen food for your fish, you’ll need to consider your fish’s nutritional needs and your goals. Obviously, herbivores have different nutritional needs than carnivores, but does your fish need color support or weight gain? Maybe it is recovering from an illness? Choosing foods that provide the right nutritional support, whether it’s high protein, fat, or specific vitamins and minerals, will help your fish reach its maximum health level.

Also consider your goals for your fish. Are you hoping to stimulate spawning in your fish or enhance their energy levels, or are you just trying to bring more variety into their diet? Choosing foods that nutritionally support the goals you have for your fish and your tank will help you rapidly achieve your goals.

Conclusion

If you are in the market for frozen foods for your saltwater aquarium fish, use these reviews to guide you through the best products available. The best overall choice is the Piscene Energetics PE Frozen Flat Pack Mysis Shrimp, which is nutrient-dense, stimulates a feeding response, supports healthy colors, and can condition your fish for breeding. For a better value product, then the Hikari Mega-Marine Algae is the best option for your herbivores. This food provides a nutritional profile that is difficult to achieve at home. If you’re feeding carnivores, then the Hikari Bio-Pure Jumbo Blood Worms are a fantastic option for health support and satiety.

Featured Image Credit: Dobermaraner, Shutterstock