Aquarium fish feed
Food is plant or animal material intended for consumption by pet fish kept in aquariums or ponds. Foods normally contain macronutrients, trace elements, and vitamins necessary to keep captive fish in good health. Approximately 80% of fishkeeping hobbyists feed their fish exclusively prepared foods, that most commonly are produced in flake, pellet, or tablet form. Pelleted forms, some of which sink rapidly, are often used for larger fish or bottom-feeding species such as loaches or catfish. Some foods also contain additives such as sex hormones or beta carotene to artificially enhance the color of ornamental fish.