Acanthurus achilles - The Achilles Tang is moderately difficult to keep. They seem to be more delicate than the yellow or blue tangs. It is important that you feed Tangs a good variety of live, frozen, and prepared formula foods with emphasis in vegetable and spirulina. Best to feed small amounts several times a day. Nori in a seaweed clip is ideal.
In the aquarium the can get territorial especially if another tang is added to a tank with an already established achilles.
They grow quite large (11") and need lots of swimming room, and water movement.