Powder Blue Tang

Powder Blue Tang (Acanthurus leucosternon) is a marine tropical fish belonging to the surgeonfish family, Acanthuridae. Tropical waters of the Indian Ocean are where they can be found. The species lives in shallow, clean coastal waters that are almost always surrounded by a reef. It favors places on seaward slopes and reefs with flat tops. The powder blue tang, like most fish in the family Acanthuridae, is herbivorous, eating mostly benthic algae. This animal has a diurnal activity. It is solitary, territorial, and aggressive with other surgeonfish.

The fish can grow to a maximum length of 23 cm (9 inches). The body is squeezed laterally and has an oval shape. Acanthurus leucosternon swims with its pectoral fins, just like other surgeonfish. The caudal fin is shaped like a crescent. The base of the fish's tail is home to an elevated section of the spine known as the "surgeon's scalpel". The teeth are small and sharp to fit into the microscopic spaces of food, and the mouth is short and pointed like a beak. Its sides are blue, its dorsal fin and caudal fin base are yellow, its head is black, and its mouth, throat region, anal fin, and pelvic fin are all white. The transparent pectoral fins have yellow reflections.