Worm looking creature

[Goo]

Anyone know what this is

 

[TheShrimpNibbler]

Bristle worm is my best guess, but it doesn’t really look like one of those. Could you get some closer up pics?

 

[CasaReefer]

I think it is a Brissel Worm.. But I am New don't listen to me I am just guessing and waiting for someone to tell me I am wrong but we'll see

 

[Gareth elliott]

Hard to zoom to see details zooming in on the head maybe something from the order Terebellid?

 

[DSC reef]

Possibly dorvelleidae

 

[MTBake]

Possibly dorvelleidae

My guess as well without closer/clearer pics.

 

[Goo]

Looks like a a blood worm

 

[Goo]

Are they harmful