I've got one just like that. I originally found it at the beach - I think.. and it's body was the size of my pinky nail. Now it is 1", 2.5" including the legs. I've had it for a year or so and it has never done anything wrong, doesn't bother my coral either. I feed it a shrimp pellet every once in a while and he happily comes out to get it. He has some big claws on him too. It is a neat crab and model citizen. I'll post a pic later if I can find one.