Well, to update.. I see it occasionally picking things off the rock (however I put a piece of the seaweed salad stuff on the rock, and it picked at the stuff around it.. didn't even touch the seaweed salad stuff), and it goes crazy when I put the mysis shrimp in there. It still likes to sit underneath it's rock sideways though (which I think is strange). Seems like it's playing hide and seek with me...