Improvemet of ornamental fish color with live algae feeding

In the nature, ornamental fish have a variety of beautiful colors that becomes pale or dull colored in conditions of intensive culture in breeding halls. Feeding these fish with algae can improve their color. For this purpose, rainbow trout larval stage feed was used as the base feed. The treated foods obtained from the powdering of the basic food were impregnated with different percentages of algae, which because of the high fat content of the food, this impregnation was done efficiently. They were then boiled in semi-cooled boiling water and passed through the pelletizer and crushed with cramplers to reach the ornamental fish's mouth .In this study, feeding on carotenoid-rich microalgae Spirulina platensis and 1% of Hematococcus pluvialis significantly improved body color of swordfish, ornamental trout and Cichlid in 1.5 to 2% for 3 weeks.