Nutrition is vital in fish farming (aquaculture) since feed accounts for almost half of the variable production cost. With the development of new, balanced commercial diets that support optimal fish growth and health, fish nutrition has evolved substantially in recent years. The aquaculture sector is benefiting from the development of new species-specific diet formulas as it expands to meet rising demand for economical, safe, high-quality fish and seafood products. The nutritional value of the feed varies depending on the type and life stage of the fish being cultured. When fish are raised in high-density indoor systems or cages and are unable to forage for natural food (e.g., algae, aquatic plants, aquatic invertebrates, etc.), a complete diet must be provided. Feed should not be kept for more than 90 days and should be inventoried on a regular basis.