Frozen fish food offers a wide range of varied products to meet the nutritional needs of fish. It includes bloodworms , daphnia , cyclopods , plankton , krill , mysis shrimp , clams , rotifers , artemia shrimp , spirulina , silversides and tubifex . Each type of food is rich in essential proteins, vitamins and minerals, suitable for carnivorous, omnivorous or herbivorous fish. This diversity of choices allows you to vary the diet of your fish, promoting their health, growth and vitality.