Need ID on slug

[Ejb]

Found multiple of these on my zoas. Are they a nudi or flatworm? Problem or no?

 

[Ejb]

They are super small and these were taken with my phone

 

[AlSimmons]

It's kind of hard to tell from those pictures, but if I had to guess I would probably go with a harmless Elysia slug.

https://www.lionfishlair.com/hitchhikers-guide/

 

[carmexx]

It actually looks like flat worms.

 

[carmexx]

https://i.ytimg.com/vi/AvLSbrbIJbg/hqdefault.jpg

 

[AlSimmons]

Is it completely flat or does it have any sort of protrusions or antennas? If it's the former than it's probably a flatworm of some sort like mentioned above.

 

[tommyhere777]

Flat

 

[Ejb]

Yea after looking things up I think it is a flatworm, would a velvet nudi help?