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Frozen Mysis Shrimp for Sale: Best Food for Marine Fish?
Frozen Mysis Shrimp for Sale: Best Food for Marine Fish?

Ask any experienced saltwater hobbyist what one frozen food they would keep if they could only choose one, and the answer is almost always the same. Frozen mysis shrimp. This tiny crustacean has earned a near-universal reputation in the marine hobby as the single most reliable, nutritious, and broadly accepted frozen food available for saltwater fish. But is it really the best? And are all mysis shrimp products created equal? This guide answers both questions completely.
What Are Mysis Shrimp?
Mysis shrimp are small freshwater or marine crustaceans that belong to the order Mysida. They are found naturally in lakes, rivers, and coastal ocean environments. The species most commonly used in aquarium food production is Mysis diluviana, harvested from cold freshwater lakes in North America. They are tiny, usually around 5 to 15mm in length, and packed with nutritional value that closely mirrors what many marine fish eat naturally in reef environments.
Why Do Marine Fish Love Mysis Shrimp?
Natural Prey Item
Many marine fish encounter mysid shrimp species in the wild as part of their natural diet. That familiarity translates directly into acceptance in captivity. A fish that recognizes mysis as food does not need a feeding transition period.
High in Protein
Mysis shrimp are naturally high in protein and essential amino acids that marine fish need to maintain muscle mass, vibrant coloring, and strong immune function.
Naturally High in HUFA
Highly Unsaturated Fatty Acids are critical nutrients for marine fish health. Mysis shrimp contain naturally occurring HUFA without requiring additional enrichment, unlike some other frozen foods that depend on gut-loading or vitamin soaking to reach acceptable nutritional levels.
Digestibility
Mysis shrimp have a soft exoskeleton that marine fish digest efficiently. Very little nutritional content is wasted, and the low waste production compared to less digestible foods means less organic load on your filtration system.
Broad Acceptance Across Species
From clownfish to tangs to dragonets to angelfish, the list of marine species that readily accept frozen mysis shrimp covers almost the entire hobby. It is the closest thing to a universal marine fish food that exists.
PE Frozen Mysis Shrimp at Dr. Reef’s
Not all frozen mysis shrimp products are equal in quality, and the difference matters more than most hobbyists realize.
PE Mysis Shrimp 16oz Flat Pack
Dr. Reef’s Quarantined Fish carries the PE Frozen Mysis Shrimp 16oz Flat Pack priced at $13.99 to $54.99 depending on quantity selected. PE Mysis, produced by Piscine Energetics, is widely regarded as the gold standard of frozen mysis shrimp products in the marine hobby.
Why PE Mysis Stands Apart
PE Mysis is harvested from Okanagan Lake in British Columbia, Canada, a pristine cold freshwater environment. The shrimp are wild-harvested, flash-frozen immediately after collection, and contain no additives, preservatives, or fillers. What you get in the flat pack is pure, whole mysis shrimp at peak nutritional value.
The Flat Pack Advantage
The flat pack format is a practical favorite among hobbyists for very good reason. The shrimp freeze in a thin, flat sheet that allows you to break off precisely the amount you need for each feeding without thawing the entire block. Less waste, better portion control, and consistently fresh food from the first piece to the last.
How to Feed Frozen Mysis Shrimp Properly
Thawing Method
Never add frozen food directly to your tank. Thaw a small portion in a cup of tank water or RO water for two to three minutes before feeding. This removes excess phosphate from the packing water that can fuel algae growth in your display tank.
Rinsing
After thawing, strain the mysis through a fine mesh strainer and rinse briefly with clean water before adding it to the tank. This step significantly reduces the phosphate and nutrient load introduced with each feeding.
Feeding Frequency
Feed most adult marine fish once or twice daily. Offer only what the fish can consume within two to three minutes. Remove any uneaten food promptly to protect water quality.
Target Feeding
For slower, more passive fish like Mandarin Dragonets, pipefish, or seahorses, use a pipette or turkey baster to direct mysis directly to the fish rather than broadcasting it into open water where faster fish will intercept everything first.
What Fish Benefit Most From Mysis Shrimp?
Dragonets and Mandarins
Captive bred Mandarins conditioned to frozen foods depend on mysis as their primary caloric source. PE Mysis is the top choice for these delicate, high-value fish.
All clownfish varieties accept mysis eagerly. It supports excellent coloring and breeding conditions in pairs.
While tangs are primarily herbivores, regular mysis supplementation provides essential protein and fatty acids that keep them in peak health alongside their seaweed-based diet.
Large angelfish like the French Angelfish and Koran Angelfish benefit enormously from high-quality mysis as part of a varied diet alongside sponge-formula foods.
Lionfish and Predators
Mysis works well as a supplemental food during transitioning predator fish from live prey to frozen alternatives. Mixed with silversides during training, it helps introduce the idea of frozen food as an acceptable prey item.
Is Mysis Shrimp the Best Marine Fish Food?
For sheer versatility, nutritional quality, and broad acceptance across species, PE Frozen Mysis Shrimp earns its reputation as the best all-around frozen food in the marine hobby. No single food replaces a varied diet, but if you could only stock one frozen food in your tank, PE Mysis from Dr. Reef’s at $13.99 to $54.99 per flat pack is the unanimous choice of experienced reef keepers worldwide.
Quick Q and A
Q: Why should I rinse frozen mysis before feeding?
A: The packing water contains phosphates and dissolved organics that fuel algae and lower water quality. Rinsing removes this before it enters your tank.
Q: How long does a PE Mysis flat pack last in the freezer?
A: Properly stored at consistent freezing temperature, PE Mysis retains peak quality for up to 12 months. The flat pack format makes portion control easy throughout its shelf life.
Q: Can mysis shrimp replace a copepod population for Mandarin Dragonets?
A: For captive bred Mandarins already conditioned to frozen foods, yes. Wild-caught Mandarins are more difficult to transition but PE Mysis is the top target food for that training process.
Q: Is PE Mysis better than regular grocery store shrimp?
A: Significantly better. Grocery shrimp is treated with preservatives, has a completely different nutritional profile, and is not suitable as a regular marine fish food. PE Mysis is specifically produced for marine organisms and retains natural nutritional value.
Q: How much PE Mysis Shrimp should I order from Dr. Reef’s?
A: The 16oz flat pack at $13.99 to $54.99 from Dr. Reef’s offers excellent value. Many hobbyists order multiple packs together to minimize shipping frequency and ensure they never run out.
Final Takeaways on Fish Care
PE Frozen Mysis Shrimp is not just a good marine fish food. It is the foundation of a healthy feeding program for almost every saltwater species in the hobby. At $13.99 to $54.99 per 16oz flat pack from Dr. Reef’s Quarantined Fish, you are getting the gold standard of frozen marine fish food from a seller who stocks it because they feed it to every fish in their own quarantine systems. Visit Dr. Reef’s Quarantined Fish today and stock your freezer with the food that serious reef keepers trust most.