What Kind Of Snail?

[BamboozleBean]

First time I’ve seen this guy before, very very small, with two antenna sticking out from what I can see.
He moves around pretty slow but has a cool shell.
And if anybody knows what kind of algae that is in the back please tell me.

 

[ahiggins]

Looks like a collonista snail- great little guys. Although it’s late and my eyes are sleepy so look up collonista and sundial snails. Similar patterns but I’ve never seen a sundial in person.

 

[KJ]

Collonista snail.