Itty-Bitty Snail ID Please

[karajay]

So far I've seen about 4 of these little guys, all about 1/8 - 3/16 around, brown and white color, rounded shell shaped kinda like an ear.

 

[cprdnick]

Looks like a snail I have in both of my SW tanks.

 

[thomas712]

Check them out at night I'll bet you see 10x more, if not now then a few weeks down the road.
They are not harmful. They are probably a small species of the Genus Arene (Astrea) or possibly of the Genus Macarene snail. They are perfectly reef safe and will graze film algae at night.
I have more than I can count of these guys.
Thomas