No...not really.Before he left (I think two days earlier before I posted this)some one at the lfs said it was a sea snake. He (or me)knew what a sea snake was,but didn't think it was one.But,it may actually be one.It seems to cooperate with eating the feeders (he only feeds them as treats) when he feeds them to his lionfish. He also had some reef chromis (six I think) and now he only has two. Remember this was all before I posted this topic. It also seems to hang around on the bottom and on the live rock.