Help with Crabs

[MACATUA]

I just got a neat new crab at the LFS but all he could tell me was that it was a Red Crab. However, I tried to look it up on the internet and I can't find anything about him. He is about 3/4" wide. He is bright red with a blue belly. He just dug in the sand last night and hid under a rock. Anyone got a clue about him? Will he be a bit more outgoing when he gets used to the tank?

 

[kidafius]

this is a bad picture, but does he look like this?

 

[kidafius]

Sorry.....this?

 

[MACATUA]

Kinda. Can't tell. Does the crab in the pic have a dark blue belly?