My sunrise dottyback terrorized my poor mandarin and pulled him out after he killed a small radiant wrasse I tried to add. It depends on what other fish are in the tank. He left my tangs, CBB, anthias, and blood shrimp alone and the guy who got him said he's doing great in his tank and not being aggressive. I guess he was put in his place by a few of his fish. Got torn up a little, but now is very passive to the other fish who have been there for 5+ years.