We've got 'em down here in Florida. Fisherman often use them for bait.
If you plan on getting one to keep I'm afraid I don't know much about keeping them.
I did have a small colony of them for awhile which I kept in moist sea sand collected from their habitat upon which grows some sort of algae which makes up at least part of their diet.
They make burrows in the sand and the males have a large claw and a tiny claw. The large one used for courtship and ritual battle.
Hope that helps a little