Unknown Crab Help!!!!!!!!!!

[marinelife]

Hey all I have a crab in my Live Rock, it is black and has white at its joints, and hides in the holes in my Live Rock. Any Idea of what kind of crab it could and if I need to try and get it out. I hope it is reef safe because it is in a huge rock with corals on it and would be hard to get out. Thanks

 

[Anonymous]

Sounds like a type of anemone crab, but I can't say for sure without seeing it. Most crabs are harmless unless they are big enough to catch and hold a fish - this is of course depending on the size of the fishes in the tank.
Is he showing himself in daylight? If not peek in the tank with a flashlight an hour or two after you turn the tank lights out. See what he's up to. Chances are he's not picking on any corals.
Jim

 

[marinelife]

So far the most I have seen of it is just its claw and a very small part of its body, It usually comes to the top of the rock and sticks its claw out and crabs algae of the rock when my MH go off. I just today have seen its claw out during the day