Something similar happened to me as I was spear fishing with a buddy in Laguna Beach when I noticed him above me motioning towards the surface. I ignored him at first, but he continued to motion, so I went up not a happy camper as I had been following a big one. At any rate, what I had thought was my fin getting caught in the kelp was actually a Moray biting on it. :) So, back I went to find him, but couldn't. They are good eating, but you need to shoot them through the head, otherwise they'll go right for you if hit in the body.