mine is very very well behaved. i have no covers on my tank and i inverts in my tank, he hasnt escaped once or niped at the inverts.. hes about 1ft long. i also have 2 percula clowns a maroon clown, a fu manchu lionfish, and a brown banded bamboo shark, and he doesnt touch em. he actually lays with my shark, kinda weird. but he is very aggressive wene feeding time comes, he trys to bite my fingers, so i put rubber gloves on.