This natural blend of fresh, raw seafoods provides an excellent source of pure marine protein and creates an exciting flavor that tropical fish cannot resist! For optimum balance of nutrition, feed Prime Reef alternately with Formula Food from Ocean Nutrition (ie. Formula One in the morning, Prime Reef in the evening). Best Used For -Miniature-Reefs Aquariums, Damsels, Anemonefish, Chromis Anthias Gobies, Blennies, Wrasses, etc. Occasionally Used ForSurgeonfish, Pygmy Angels, African Cichlids IngredientsMarine shrimp, marine clams, squid, zoo-plankton's (E. pacific and E. superba), spinach, seaweed, fish oil, mussel, lobster, fish roe, scallop, vitamins (choline chloride, ascorbic acid including stabilized vitamin C, vitamin E supplement, niacin, thiamine mononitrate, folic acid, calcium pantothenate, riboflavin, menadione sodium bisulfate complex, vitamin A acetate, pyridoxine hydrochloride, vitamin B12 supplement, vitamin D3 supplement, beta-carotene supplement, biotin), amino acids (dl-methionine, taurine, lysine), and trace elements (manganese sulfate, zinc sulfate, copper sulfate, sodium selenite)Guaranteed AnalysisCrude Protein (min) 4.5%Crude Fat (min) 1.0%Crude Fiber (max) 2.0%Moisture (max) 92.0%(Protein as a percentage of dry matter 56.25%) Ocean Nutrition, originally founded in 1982, has never wavered from its original goal to provide the freshest and absolutely best possible foods for marine and freshwater tropical fish. The original concept, rooted in the early days of marine tropical fish breeding and culture, including anemone fish, Garibaldi and yellow-head jawfish, was to duplicate the natural and very complex diet that coral reef fishes feed upon in their natural environment. The task was not easy since their biologists had to find a readily available substitute for the many tiny invertebrate critters, eggs, and plankton that were the normal prey of these beautiful and exotic fish. The formulas gradually evolved over the years, and then were promptly improved and expanded upon as the ingredients became fresher, more exotic, and closer to the natural source of the coral reef itself.Ocean Nutrition is recognized as the pioneer of formula diets and unique in its approach to provide the same Formula Feed in different forms: many are available in frozen, flake, and pellet form.