i recently spotted a crab. as soon as the lights came on he scurried into his rock.this was last week. today i seen his legs hanging out of his crevice. only three legs i could see though, plus i never actually seen his pinchers so i guess it may not even be a crab. its all white, not bright though, almost like a clear white. very bristly, and hairy. legs look a lot like my emeral crabs legs. i know a positive ID is impossible but i just want possible suggestion and or course of action. i have no corals yet but will someday...