Whitecheek surgeonfish

Acanthurus nigricans is a surgeonfish with an oval, laterally compressed body, dark brown to black, with a large white patch on the cheek and a white band at the base of the tail. It has a sharp caudal spine on each side of the caudal peduncle. In the aquarium, it is active and needs plenty of swimming space. It is a herbivore that grazes on algae on rocks and decor. It can become territorial with other surgeonfish.