I have a domino in with a few other damsels, coral beauty, several tangs, niger trigger, acouple foxface, a few butterflys, wrasses, and a goby and he doesn't do too bad. Of course I have a large tank and a large portion of the fish are larger than he is. He only acts up when I put a new fish in the tank and then he is a bully for a day. occassioanally he darts after someone, but my Naso usually rounds him up fairly quickly. Not a fish of choice, but you may be okay if you don't add any new fish. Or get a much bigger tank.