Thompson's Tang (Acanthurus thompsoni), also known as Thompson's Surgeonfish, is a unique and rather rare fish in the aquarium trade. It has a dark brown or blue body with yellow highlights on its fins. They naturally occur in large schools among deep channels and drop offs. They dark waters with high current and oxygen. They reach a size of 11 inches and require an aquarium of at least 250 gallons, due to their need for space to swim. They typically feed on small plankton and other fish eggs, and should be fed a variety of foods to keep a well-balanced diet. They should have access to seaweed or macro algae regularly.