Pest id please!

[ProvidenceTidalReef]

Looking to identify this as friend or foe.. have never seen one. Looks similar to bristle worm? Only I've only seen red ones and there huge. So not sure what this little guy is. Fell off my zoas when I pulled out for a dipping.

 

[Hincapiej4]

Bristleworm. Might be a fireworm.

 

[NashobaTek]

+1 bristle worm

 

[Gtinnel]

Bristleworm (Eurythoe complanata) I believe. A close up of the head could rule out fireworm, which I'm almost positive it is not.