Who is this new crab?

[BCWolfen]

I saw some movement in a hole today which at first I thought was just some sand shifting or something. Until it moved again! After much patient waiting I finally got the best pic I could of this unknown crab. I don't have a macro so this is as good as it gets. I left my cleaner shrimp in teh frame for size reference. His body and arms are white, the pincer itself is black/green as is his 'mask'. His legs are white and fuzzy. He is hiding in the hole in the centre of image.

Can anyone ID this masked marauder?


So I thought I'd take a flashlight stroll through the tank, and lo and behold teh new critter was out for a midnight snack. Heres a couple of extra shots to help identify him, they aren't the greastest as the only light source was my flashlight.





Thanks