Commercial fish food is specially formulated to provide essential nutrients for various species of fish kept in aquariums or fish farms. It typically comes in different forms, such as flakes, pellets, or granules, catering to the dietary needs of both freshwater and saltwater fish. The ingredients often include proteins, vitamins, and minerals to promote growth, health, and vibrant colors. These products are designed to be easy to use and can be purchased from pet stores or online retailers. Popular brands may include Hikari, Tetra, and Omega One, each offering specific formulations for different types of fish, such as tropical, goldfish, or cichlids.