Steve that is a Stomatella. Good guy, a kind of snail.
Sushigirl, is there something special about blue clove polyps? I have some that I got for free. They were attached to a rock covered in aiptasia so I was given them for free. Got my old pep shrimp to take care of the aiptasia and left with the free blue cloves. Started with about 5 little polyps, now about 20 or so. Do you like them just for personal reasons like they are pretty? Or are they hard to get or something?
Oh and Sushi you mentioned a pink stomatella you had. I found a small one I had not seen before in my tank. It's shell is baby pink with tiny green stripes. Is that like yours? I wish you could buy them like regular livestock, I like them more than any other snail.