Request for help identifying a worm. Dorvilleidae?

[Squist]

Tonight I had my first sighting of a couple worms in my new tank--happy to see some biodiversity, presuming they're good. What's cool is that they are really good swimmers. Oddly good. A little freakish how good and deliberate they seem. I ran a Google image search and results came back as dorvilleidae.

Anyone able to confirm? Are they a-ok and beneficial?

(Pic of one in my tank. Just several mm in length.)

Another pic in this thread:

Is This A Bristleworm? - Identification Forum - Nano-Reef Community

www.nano-reef.com

 

[JVU]

I‘be never had bristleworms that swim, so that’s interesting. I can’t tell from the pic any more than that it seems like a type of bristleworm, of which there are many many different types and almost all are considered good CUC.

 

[Squist]

... seems like a type of bristleworm, of which there are many many different types and almost all are considered good CUC.

That's what I'm reading too. I hope to get a video of them. Will take some experimenting with lighting to capture video. I saw as many as a half-dozen simultaneously last night swimming about.

 

[svreef]

We spotted this one today. Looks similar

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[bluprntguy]

Looks like a standard bristleworm to me.