Bad Crab?

[guzz64]

I cannot get a pic of this guy. He is the same in shape and features of an emerald crab. He is whitish to grey with black rounded tip pincher claws. He is in the center of my birdsnest coral. Does not seem to be bothering it.

His body is about the size of a nickel. I am not sure what to do about this guy. Should I be concerned?

 

[dc]

With crabs always. Try looking here.

crabs

 

[Kent E]

I had one as you described and it ended growing into the crab in the top left in the link. Nasty crab!

I'd say get him out!

 

[Kgoarmy17]

Black tips on the claws sounds like a stone crab to me. Usually they don't play within the confines of your corals though.