Another strange critter in my reef

[vcarlyle62]

So, this guy decided to pop up on front glass in a clump of zoas, at first I thought it was a snail and I just couldn't see his shell... but as he creeper out I saw no shell at all. The part stuck to the glass is about the size of a dime. My tank is over a year old and I have not seen any harm to any of my corals so I'm hoping he's a good guy. Anyone know what this is?

 

[vcarlyle62]

Here's a pict of him off the glass

 

[WheatToast]

Stomatella snail, the shell is difficult to see since it is so flat. These will feed on film algae and reproduce. Free CUC!

 

[vcarlyle62]

Stomatella snail, the shell is difficult to see since it is so flat. These will feed on film algae and reproduce. Free CUC!

Whoa!! I had no idea they got this big ! I've seen smal tiny ones only so I guess I only thought of them as tiny is all they grow