crab help!

[triggereef]

hey guys just one question..

I have a crab in my tank that is about 2" in diameter and he is pitch black..thinking he must of been a hitch hiker on my LR..

i have tryed and tryed to get him out for a while now with no result,,

Any ideas??

im thinking if i could add some sort of reef fish if possible that would take care of the problem but if not ill just find a trap..

Thanks for reading!

Taylor