I got a small piece of acropora a few weeks ago. I have since noticed a crab sitting inside of it. I don't have a camera so I cannot get a pic. The crab looks to be pinkish color with black tips on its claws. Should I try to get this little guy out or just leave him in there. I know all about claws being bad for the tank but he doesn't seem to bother my zoo's or anthelia.