I'm not sure but I work right next to the petland that I got it from, I will ask the guy who orders the livestock. That petland is awsome because it's not corperate, and has nothing to do with petland, they just kept that name so they get mor ebuisness.
It is of an asian origin and it is fully aquatic. That's all the guy knew he said that he searched the whole web for answers. He said that when he calls the next to order more fish he will ask for the scientific name, he also said that it is a very rare crab "one of those things you see once in blue moon".