The Chevron Tang is a very beautiful fish that is orange with bright green squiggly lines (chevron markings) covering its body. They prefer lots of rockwork and swimming room. The Chevron Tang will spend most of its day grazing on algae from live rock and aquarium glass. Keep only one per tank. The Surgeonfish family consists of fish which are colorful, thin-bodied, and usually have an oval shape. These fish have long continuous dorsal and anal fins and crescent tailfins. The scalpel at the base of their tailfin is very sharp and is used by the fish for protection from predators as well as a way of establishing itself with other fish.