Seapora Frozen Spirulina Brine Shrimp are individual frozen cubes designed to provide essential nutrients, vitamins and proteins to the inhabitants of your aquatic ecosystem. Ideal for community tanks, these versatile, nutrient rich spirulina brine shrimp cubes are enthusiastically eaten by an incredibly wide variety of freshwater and saltwater fish such as tangs, rabbitfish, clownfish, angels, chromis, sharks, African cichlids, American cichlids, platies, swordtails, mollies, silver dollars and many others. Prior to freezing, these brine shrimp have been gut loaded with beneficial spirulina algae (often used as an immune system booster in commercial aquaculture operations) to provide valuable proteins and nutrients to your aquatic pets. The fresh frozen food can be fed in preparation of a stressful event such as a big water chance, transfers to a new aquarium, reconfiguring plants or adding new fish. Microwaving or thawing in hot water is not recommended, as this breaks down the nutrients contained in frozen fish food.