Sea Slug? Need ID

[loknar28]

I am not sure if anyone can tell from these photos. They are not the greatest, but the best I could do at the moment. Anyone have any thought on what this critter is and if it posses any threat. I found him hanging around the Green button polyps.

 

[johnski]

i think its a stometella snail, if it is then a good guy

 

[Lev F.]

I second the Stomatella.

 

[loknar28]

Thanks Guys, I looked that up and I agree it does look like one.