What type of snail is this?

[Xclusive Reef]

So I got some life rock a month ago. I noticed a snail, does anyone k ow what type of snail this is. It has doubled in size in 1 month I saw it. Today I saw it on the back glass and once I put the lights on it ran away into the rocks. I also noticed these white small looking lines on the glass?? Too small to see if it moves.

 

[KJ]

Stomatella good CUC.

 

[Xclusive Reef]

I just saw my clowns picking on the white dots on the glass. Is it possible that the clowns are the spawn?