What kind of crab am I?
 

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.

http://species-identification.org/index.php lots of information to go through but awesome tool to id your crab.

It is not likely you will be able to get a species name, but you may be able to get a genus name for it. A pic would help. It doesn't matter much though, as most crabs are not reef-safe. Many hermit crabs are even borderline at times.