Swimming worm thing ID

[BillV]

Anyone have any idea what this is? I occasionally find them in my reef tank at night swimming in the water column. I thought it was a bristle worm but was told no by the LFS.

 

[Tradevg]

Is it red? Looks a little a spaghetti worm but never seen them swimming freely.

 

[kevgib67]

Is it red? Looks a little a spaghetti worm but never seen them swimming freely.

Ya when it stopped moving that’s what it looks like. OP, don’t give it anymore coffee!

 

[BillV]

Thanks. They always look that excited. So I shouldn’t be using coffee grounds as filter media? lol.

 

[fish_collector]

Always some neat creatures found in a reef tank. He's probably causing no harm.

 

[JumboShrimp]

This guy may know what it is. LOL!

 

[EricR]

I was thinking eunice or dorvilleidae worm but can't really see it that well.

 

[Michael Hughes]

I wish I had that much energy.

 

[JumboShrimp]

(It looks as if one of his pet-worms escaped.)