Genus Acanthurus is a group of fish commonly known as surgeonfish or tangs. These fish are characterized by their razor-sharp spines on either side of their tail, which are used for defense and territorial disputes. Synonyms for the Genus Acanthurus include brushfin tang, combtooth tang, sailfin tang, and unicorn tang. These fish are popular in the aquarium trade due to their bright colors and interesting behavior. They feed on algae and are important in maintaining the health of coral reefs. In the wild, they play a key role in the ecosystem and are often preyed upon by larger fish.