Can anyone ID this?

[kjohansen]

I saw this one and another one. They move around and I have seen like a white tenticle or something come out of this one.

 

[curlsoc]

Stomatella? Does it look like a squashed snail?

 

[reefer545]

It sure looks like it Curly.

 

[bigblue69]

It does look like a stomatella snail. They are algea eaters so good for your tank.