I don't get bit by my clowns anymore. I train them to eat out of my hand. Over time, they learn that my hand is a source of food, and not an invasion of their territory. I might get a little nip when I first put my hand in the tank, but once they realize I don't have any food, they let me go about my business. I never get that territorial, I'm going to kill you, bite like I used to. Back in the day, I would get bit all the time. I even had an ocellaris that would bring blood. She wouldn't stop either. As long as my hand was in the tank she was after it.