Worm id? Thought epitoke but it crawls?

[a.t.t.r]

These were swimming around the tank at night seemed semi attracted to night but then it latched into a rock and started crawling and even attempting to burrow into the cracks. I got it under a microscope on a slide with cover in a single drop of water.

 

[vetteguy53081]

Looks like dorvillidae worm- cousin to the bristle worm