Is this some kind of bad flatworm or ????

[markkazdad]

I can't really see it's back; could it be a small stomatella or baby snail? There are a couple of them and are ~1 mm wide, if that. I'll see them scooting along the glass, especially at feeding time.

 

[NanaReefer]

Here ya go!
http://www.melevsreef.com/id/clear_flatworm.html

 

[markkazdad]

Yep, that looks like it except I hadn't noticed any inflation like a sail. I'll keep an eye out.

It's amazing how many species are in this little 2 gallon tank, and I'm only counting the visible ones.