mantis shrimp?

[possitive k]

i have found one in my tank, now he must have been there for a while and is not attacking anything,i have a few hermits and fish,lta,monti cap. he just hides in his hole in the rock and when i feed the fish he pokes his head out and grabs what he can. are there less agressive mantis shrimp? or should i try and trap him and get him out of there?

thanks,kristian