Good or bad

[danispin720]

Hey fam,
I started noticing the small looking slugs... not sure what they are and havent had luck IDing here.... are they bad? I have a few corals and dont want any of these munching on them

 

[jabberwock]

I think those are flatworms? Following...

 

[ISpeakForTheSeas]

Yeah, looks like some kind of acoel flatworm to me - you probably want to remove them, but they shouldn't hurt your corals (at least not when in reasonable numbers).