website on reef tank crabs

Does anybody know of a website that has photos and descriptions on the different types of crabs that appear in a reef tank.

I have a crab in the tank that looks similar to a emerald crab, but doesn't have the hairy legs and has 2 large claws and is dark in color. He comes out of the rock every once and a while and I can't get a good shot of him with my camera.

Thanks

 

Maybe this link will help???? :-/

http://www.njscuba.net/biology/sw_crabs.html

 

Thanks! I didn't see anything that looked like my crab, but definitely an interesting link. I think my only hope is to have him pose for me so I can get a snapshot and post it up here.

Sean

 

Just a wild shot in the dark here but maybe a porcelain crab. They pretty much look like an emerald crab and they come in different colors. Do a search on google images for porcelain crab and you'll see a whole bunch of them.

Marc.

 

Thanks, I will check it out.