The Powder Blue Tang is a good example of just how beautiful a tang can be! The color of the Powder Blue Tang is bright light blue with a yellow dorsal fin and caudal peduncle. The face is darker and outlined in white. This fish grazes on algae all day long. The Powder Blue Tang is a delicate speciman and we do recommend that only advanced aquarists, or ones that have read extensively on this fish, take a chance at owning this fine speciman. Only one should be kept in a tank alone. Putting more than one of this fish in a tank, could lead to them fighting. Although it will eat just about anything, we do recommend a lot of greens. We also recommend keeping this fish in an aquarium of at least 180 gallons.