I have a midnight black angel in my tank with a sailfin tang,sixline wrasse, domino,yellow tail, and bluse damsel, sleeper goby,scooter blenny,tomato clown, crabs,soft corals (mushrooms,rose,finger,zoo's),stoney corals(fox,bubble,candy cane,frog spawn), anenome's, feather dusters. When I first put him in he nipped at just about everything, but stopped after I started feeding him something everyday. I can say one really good thing about hime is that I had an infestation of sponge in my tank untill he went to work on them. Now he is best freinds with my sailfin tang. It is comical to watch them together. :hilarious