Say hello to my little friend(s)

[shawnb199]

Just above and to the left of the (out of focus) firefish, you'll see a little guy, I'm thinking a baby snail. Hard to show the three dimensional view, but these guys are essentially flat when viewed from the side. I just populated a new tank with a piece of rock and two fish from a tank I had broken down, and a few days later had a couple dozen of these guys on the glass. What are they? Googling baby snails of the various varieties I knew to exist in the previous tank didn't yield anything that looked very similar.

 

[D Z]

Acoel flatworm. Pretty much harmless as long as they don'y overpopulate to the point where they starve coral of light. I had them for a month or 2 in my previous nuvo 8, but they eventually disappeared. I wouldn't worry about it.