Very very tiny snail like critter on the glass.

[fasteddie99]

I've had these really tiny slug like critters on my glass for over a week now and was wondering if they were good or bad guys. I couldn't get a very good picture of them because of their small size. I included a small mini star so you can see just how tiny they are. I've had nassarius snails lay eggs in the past many time so I am hoping that is what they are. Corals and fish seem to be just fine.

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[TripleT]

Do they move slow and methodically? If so, probably flatworms.

Do they dart around? Then possibly copepods.

Add anything new in the last month or two, like new rock?

 

[TripleT]

Flatworm pic. Do they look like this?

 

[fasteddie99]

They do move very slow on the glass, but they don't look like the flatworm picture. They are more pointed on what I would assume is the rear. (opposite moving end)

 

[Potsy]

The individuals on the upper right of the photo especially look like flatworms to me, but not the dreaded red ones. I'd try siphoning them out just in case.

 

[aleonn]

Could be baby stomatella snails, but it's hard to tell from the pix. Hopefully not flatworms, though.