What is this swimming in tank?

[wonderd]

Hey everyone, turned only blue light on today for the first time and I noticed around 20-30 small things swimming in the tank. I'm not sure what they are. I know the tank has some small coepods but is that what these are? Video at this link http://screencast.com/t/yeaT6JAIthey can be pretty fast if they want to. Some of them were swimming in very fast circles. Appreciate any help guys.

 

[Tahoe61]

Hard to tell for sure, I am guessing Epitoke of bristle worms, or mysis shrimp.

 

[Lionfish Lair]

The video won't load for me.

 

[wonderd]

Try this link https://vid.me/UHn6

 

[Lionfish Lair]

Did you have the pump off during the video?

 

[wonderd]

Yes that is correct.

 

[Lionfish Lair]

Then my guess would be mysis.

 

[wonderd]

Maybe...maybe. I did put some live Mysis shrimp in the tank a LONG time ago but I thought it would be impossible that any survived and reproduced...

 

[Lionfish Lair]

They show up in tanks even if they weren't introduced intentionally.

 

[wonderd]

Oh wow, never would have known.