The Powder Blue Tang is quite simply one of the most beautiful fish in the sea. These fish are baby blue in color with a bright yellow dorsal, white ventral and anal fins, black face with white markings, and large eyes. Once established, these fish do very well in an established tank with lots of live rock and swimming room. Keep only one per tank. These fish are very fragile and do not like to be abused by other fish. They are voracious algae eaters.