I'm very lazy in talking pictures and because they're very activity it's hard to get a good picture of them but I'll try.
They're get very large, as do almost all of the Acanthurus, and really should be in tanks that are very large, at least 6'+ with plenty of swimming space. In the end unless you have a very large tank, 8'-12'+, they should probably be kept just in public aquariums. If you've been to Atlantis you would see a bunch of them in their big reef tank, which will show you how large some get.