I'd plz. Good or bad?

[bridgereefer]

 

[James M]

Welcome to reef2reef !!!!
dorvelleidae worm....good guy

 

[reef lover]

Welcome to r2r!! Resembles one but ive never seen them move like that...
@KJ

 

[DSC reef]

Has a predatory syllid look to it @Lovemyreef2015

 

[KJ]

Look like Syllid worm.

 

[Lovemyreef2015]

I agree, looks like a type of syllidae worm.

 

[DSC reef]

To the OP, I'd toss it as it's not a good guy.

 

[bridgereefer]

Thanks guys. I appreciate it.
It would be great if you could give reasons for ID. Will help me learn for future. Thanks again.