ThunderGoose
Well-Known Member
Found this in my 6 month old nano tank. Live rock was from TBS (so Gulf of Mexico). It either crawled or grew over one branch of a gorgonian - you can see a gorgonian polyp at the bottom of the picture. It also has thin projections coming out from under the shell (not clear in the picture below). It hasn't moved since I first spotted it about 2 weeks ago. Any ideas?
