The Achilles Tang is mainly black, with orange and white highlights on its body. There is a thin orange stripe on the top and bottom of each side of it, culminating in a relatively large, teardrop-shaped orange marking near the base of its tail. Its tail is black with a bright orange line at its back edge. In a behind each of the Achilles Tang's barely visible eyes is a white, somewhat crescent-shaped semicircle.
The Achilles Tang is a species of surgeonfish native to various parts around Australia, Hawaii, Pitcairn, and sometimes the southern portions of Guatemala and Mexico. They feed on plants most of the time (mainly algae), but in captivity, they will eat varieties of shrimp. At the end of the teardrop shape near their tail, there is an extremely sharp spine, posing a dangerous threat to people handling this fish.