The importance of paying attention to the nutritional requirements of ornamental fish

      It is important to know the nutritional requirements of ornamental fish to achieve better growth and production performance. In recent years, nutritional information has been obtained about some aquarium species. Also, in some cases, the diet information of these fish can be extracted from the results obtained from farmed fish. Having the right dietary formula for the complementary needs of aquarium fish improves the digestibility of nutrients, meets metabolic needs, and reduces maintenance costs and water pollution. And at the same time feeds the complete formula of sustainable aquaculture goals.  In addition, a complete diet follows the goals of sustainable aquaculture. So far, a variety of foods such as milk powder, flakes, slaughterhouse waste, dry food and a variety of live foods including rotifers, Artemia nauplii, Moina, daphnia, Ceriodaphnia and algae have been widely used to feed aquarium fish; each has its own nutritional and production value. Considering that the coloring of ornamental fish species is important in the trade of these fish, it is recommended to add pigments and carotenoids to the diet of aquarium fish. The aim of this study was to investigate the specific nutritional requirements to improve production and thus more economical fish farming.