my striped burrfish never even got near any stars. never nipped or even toyed with my hermits, but I would fear putting a clam in. I hand feed him a clam daily, and he eats somtimes as many as 2 cubes of brine/bloodworms. My puffer is too concerned with me feeding him to worry about anything in the tank. Sometimes he spits at me when I look over the top of the tank.