Help identify worm like thing

[oakcityreefer]

This was zipping around my aquarium this morning. Could get from one side of a six foot tank to the other in a second. Only thing added to the tank in weeks is snails, urchin, and Chaeto.

 

[oakcityreefer]

No guesses?

 

[56longroof]

@ISpeakForTheSeas

 

[Michael Hughes]

Somewhat difficult to tell in the video, but I'd guess some kind of polychaete worm. Do you have any still photos?

 

[oakcityreefer]

I know these aren’t good but it’s tough to get a good pic





I flushed it after taking these photos.

 

[Channas]

Better safe than sorry, good call with the flushing

 

[Michael Hughes]

Again difficult to tell, but if I had to guess, it reminds me of the family Nereididae. If this is true, many of them are carnivorous, so flushing was probably a good move.