I bought a sailfin tang several years ago when i first set my tank up- and although his/her? sailfins sort of melted off his body(the fish guy claims it happens to this fish sometimes) and never grew back, he has become the senior member of our tank, and he got kind of chunky, but not very much longer. He has excellent appetite(never misses a feeding) and he is generally peaceable- even with the new little tang(I am not certain of the species) that I recently added. He also eats mostly anything I feed them. All in all, I would buy another sailfin tank if i was setting up a tank again.