Possible dorvilleidae worm with video and 1200x magnification

[vugrad07]

I see these guys on the glass and swimming/wiggling through the water at night after all lights are off. Looking around on the forums and image searches, it appears they are dorvilleidae worms, but second opinions are welcome. Uploading a video and a view of one of them under a digital microscope. Pretty cool looking critter (if they're not going to be a problem!).

Video Link (YouTube)

 

[shred5]

I think that is accurate.

 

[vugrad07]

It may be helpful for others to also see a still frame from the video, showing what they look like to the naked eye.