I had one. My lfs sold it to me as a halloween hermit crab, but I think it's actually an electric orange. Look up pics of the two on the net. Mine went back to the lfs after about a week. He ate over half of my corraline alge off of the rocks. Since I have a FOWLR, the corraline is where I get color for my tank. I was not happy with the little guy!
They are awful cute though. I love there colors. Mine had a shell that was almost completely covered in purple corraline. I'd be curious to know if yours causes any probs. Good luck!