Help ID this crab please!!

[Lion_Babe]

I got this crab at the LFS and they knew nothing about it. It hides in the sand until it is ready to eat. It eats mysis shrimp so far. I want to give this crab the best tank I can, but I need to know what it is to do that. The spots on it are purple.

Thank you!!!
:rollface:

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[Lion_Babe]

Sorry this got posted in the wrong spot.

 

[DJ88©]

[moved]

 

[LeslieH]

FYI for people who don't check the Reef Discussion forum..... this crab has already been identified as the Indo-Pacific species Ashtoret lunaris. It's an unusual sight at LFS because the species normally lives buried in sand or mud - not the typical candidate for a reef tank.
http://www.reefcentral.com/forums/showthread.php?s=&threadid=1077544&highlight=ashtoret