Need help on Mantis Shrimp I.D.

[29GallonReefer]

I just found this guy in a rock today. He is about an inch long and is solid green. THe green is very light, almost as if he is transluscent. I cant find a pic yet of him. ANyone know just from the color what he is????

 

[Gonodactylus]

There are at least a dozen species that it could be.

Roy