yeah he does he swings them at the fish its pretty funny an he is clumbys as well knocking over some of my corals and i have also seen him bench pressing my colt coral frag as well just to clean the bottom of the rock the colt is on so some times they can be a pain if you have some corals you are trying to get to stick to rocks...I have been trying to catch a few to put in my other tank when i do catch one i cant get them of the rock the are pretty strong little buggers..