I purchased a keyhole angel on Friday. For the most part it has been hiding in the rocks, but is spending more and more time out in the open. I have noticed it picking a bit on a favia over the last few days, but have not noticed any visible damage. Tonight however when checking out the tank I noticed that the polyps on most of my corals were recessed and my acans were all recessed. Is this likely due to the Angel picking on them? When he starts eating with the other fish, is this likely to decrease or do I need to start thinking about capturing it and bring it back to the LFS?