Thin White Worm with Slightly Bigger Head

[ItsAName]

I couldn't take a picture of it because it was on the back of my glass and the camera wouldn't focus on it, but I had two white worms (each about 1 inch long), super skinny, like a thread, with a tiny sphere head (almost looked just like a bump) Never saw them before, both were moving pretty fast along the back glass. Any thoughts?

 

[GHsaltie]

The only thing I can think is dorvilleidae, https://www.lionfishlair.com/hitchhikers-guide/polychaete-dorvilleidae/

 

[ItsAName]

The only thing I can think is dorvilleidae, https://www.lionfishlair.com/hitchhikers-guide/polychaete-dorvilleidae/

It had zero legs.

It looked like this but with a tiny bump for a head

http://www.infonet-biovision.org/res/res/files/3608.400x300.png

 

[GHsaltie]

I dunno, could've just been a worm. I'm sure there is all kinds of stuff that ends up in our tanks that have not been fully explored yet.