Help me ID this little guy

[GilliganReef]

Came home from work and started to clean the glass of my tank and found this guy on the glass. He lucky I saw him or he would have been scratched up with the rest of the algae. At first glance I thought he was one of my snails lost his shell but I found all three still eating away. Who is this guy and should I have killed it or leave it? I do wanna apologize for the photos. He was up in the corner in hard place to shoot.

 

[thegrun]

Looks like a stomatella snail, a good member of your clean up crew. Run a Google search to confirm, the picture is hard to see.

 

[kgeig001]

I agree with thegrun.

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