Yeah it seemed to be hairy. I've not seen it yet I thought it was the crab, but when I picked it up it was only the molted body. So he is somewhere in my tank hiding.
Beg to differ, but if hairy (other than the legs) most likely not an emerald crab.
95% if not higher of hairy crabs are predatory to corals.
Keep an eye on it, or just to be safe, put it in the sump.