Help with ID'ing worm

[Ariel.Negron]

Hi Reefers,

I need some assistance ID'ing a very small worm. I recently noticed there were over 20 of these worms in my tank, so I managed to capture 1 and put it under a microscope to get a better view. The actual size of the worm is about 3-4mm.

 

[ISpeakForTheSeas]

It's definitely a Polychaete worm (some type of bristleworm) - I can see two cephalic tentacles (tentacles by the head/mouth) for sure (they're quite difficult to see in the pics due to the transparency of the worm over the white background).

Personally, I'd guess that there are four tentacles, and that these are Dorvilleid worms (which are good CUC), but I could be wrong.