I guess I'm lucky that my maroon never attacks anything. He has a host RBTA and even when I stick my hand near him and his home, he just watches. Of course, my old Maroon attacked the hell out of my hand everytime I put it in the tank.
Only been bitten by a zebra moray eel. I was feeding him some formula 2, and my girlfriend called my name so I looked away for a split second. The eel must have thought my finger was the food. He let go right away, and it was more comical to see my throw my body away from the tank like a great white was attacking.
Oh, and my cleaner wrasse always picks at my hand/arm when I'm cleaning the tank. But that doesn't count.