The aquaculture industry has grown in recent years, and the proliferation and breeding of various types of ornamental fish have become widespread in aquarium conditions. Raising production and economic efficiency in aquaculture, proper nutrition, and the use of diets with the highest efficiency for reducing dietary intake and nutrition costs is essential. Among them, chloralhemic algae can be used as an appropriate supplement for the production of ornamental aquatic products. It will work Chlorella is used as a food for animals and humans and a food supplement in the pharmaceutical industry. In aquaculture and aquaculture industries, since the production of ornamental aquatic products is already an early task, and given the importance of food preparation in aquaculture, it is necessary to have a variety of foods that have a positive impact on the indices of production Like, growth, metabolism, vitality, and resistance to a variety of diseases. In the meantime, chlorella algae can play a role in proliferation, growth, immune system and fish survival because of the richness of proteins, vit This algae has about 30% protein, 15% fat, 30% carbohydrate and 5% minerals, and in suitable conditions, up to 50% of the dry weight of this algae is protein and 8.5% of it is fats. amins, essential amino acids, minerals, essential fatty acids, polysaccharides and carotenoids. In addition, because the most important attraction of the ornamental fish is their color and the fish are not normally able to synthesize the carotenoids needed to create the proper color in their own, they should be added with feed to fish feed, For this reason, chlorella algae is also useful as a source of pigment production and is widely used in the aquaculture industry as a nutritional supplement in nutrition management and nutrition management.