Can someone ID this worm? Thanks

[Myka]

That certainly may be Oenone fulgida. Do you have any trouble keeping molluscs?

[reeferfulton]

crazy ugly.
this is why convinced myself to start with dry rock.

[Dearth]

That worm is definitely in the category of bad worms to have in your tank it is known to eat snails, shellfish and there have been reports of it attacking sleeping fish.

[Aquattro]

I would suggest any worm that isn't a bristle worm should get flushed. Just in case.