Help! I have a new arrival.....

[KellyNY]

I recently discovered this crab in my tank. I have tried to figure out what he is with no success. He has recently grown really big. I'm worried about my corals. Any ideas???
-Kelly

[Reefing Madness]

Possible Mithrax Crab, but unsure.

[KellyNY]

Ok, that was one of my thoughts too. When I first noticed him I didn't think much of it. But now he is so big and as you can see from the pic he is so close to my corals. I haven't noticed any damage, but i sure don't want to come home one day and see any. I'm new at this and have taken my time to build what I think is an awesome tank. So do you think I should try to catch him and take him to my fish store as a donation?

[Reefing Madness]

Well if he has enough algae to eat he won't bother the corals, but once he figures out they are yummy, then he's gonna wat em up. So, me, I'd pull himout.