Worm on glass

[mimaone]

I know this is a terrible picture, but it was the only one I could capture last night. Any idea what this may be? It was about an inch long and could stretch out to move along the glass as it wasn't tolerating my phone camera light. Thanks in advance.

 

[KrisReef]

A little feather duster ?

 

[mimaone]

Without feathers?

 

[Lovemyreef2015]

Dorvilleidae worm

 

[mimaone]

Dorvilleidae worm

Thank you! I don't have any fish or coral yet in my tank, saw this and snapped the pic as fast as I could. Glad it's not harmful to my tank.

 

[lapin]

I cant reall see any detail but guesses are
dorvilleidae worm
spionid worm