What kind of crab am I?

[Steeves]

Just for kicks turned on the lights tonight and to my surprise i found a crab. He must have been in there for a while cause i haven't added live rock for a long time. I caught him with some tongs and put him in the sump. Just wondering if you might know what he is. He has a green shell with stuby claw arms and crazy red eyes that are far apart. He has a smooth shell and has some good size to him. I will try to get a pic tomorrow.