Help to ID Flat Snail

[Finley]

Hi all. We noticed this flat looking snail on the back of the tank this morning. Can someone help me ID it?
Stomatella? Limpet?

http://www.canreef.com/vbulletin/picture.php?albumid=998&pictureid=7320

[Dearth]

I'd say that is a flatworm and they procreate fast

[patpare]

Those are limpet's
I've never had problems with them.

[Kabong]

That's a chiton (armored snail) (Oval)
With a Limpet (round)

[Finley]

Tx Kabong.... That is exactly what it is and I'm glad I can just leave it in there and not go fishing...