There is actually a pair of those nasties in there, and they are old, about 15 year old female and about 8 year old male, and let me tell ya, when a male tomato clown gets that old, he is just as big and mean as momma.
I have the same problem with my pair. I use a 1mm scuba glove when working on thier side of the tank. Once she realized she could bite all she wanted with out hurting me she backs off, somewhat.
I just had to stop my pull away reflex!