What is this crab?

[gilly]

Its very small and its hairy. Looks like a spider or something. Will it hurt my corals? Its hiding in one of my liverocks where i just placed my new mushrooms.

 

[Fluff]

Are you sure it's a crab? It could be a sea spider. I got two of them on a zoo frag. They will feed on your corals and should be removed.

http://www.wetwebmedia.com/pycnogonids.htm
http://animaldiversity.ummz.umich.edu/site/accounts/information/Pycnogonida.html

If it is a crab, a pic is almost necessary for an id. Can you see the claws well enough to tell if it has flat pads on the claw tips? Or is the tip of the claw black? Are the claws themselves flat or round in body? Most crabs are harmless while small and only become a problem as they mature.

 

[gilly]

doesnt look like it in the pics, i will have a pic soon. Thanks