HELP: Hitchhiker Crab ID

dsagerman · Nov 26, 2025

Was just able to catch this hitchhiker crab that came inside some live rock I recently got. Can you please let me know if gorilla or emerald crab and if it’s reef safe or should remove? I see it hanging around corals but hasn’t done any major damage in the 2 weeks it’s been in there.

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Evil1 · Nov 26, 2025

Looks like an emerald crab. Good CUC

BristleWormHater · Nov 26, 2025

Emerald crab, Mithrax sculptus. These are reef safe with cuation, 2/4 I have kept ended up eating coral and had to be removed. They can be decent hair and bubble algae grazers.