Can you help identify this?

[siner94]

it was on my live rock.

 

[Crabs McJones]

Fan worm, perfectly harmless filter feeder

 

[siner94]

Thanks, I was wondering what it was since it appeared from nowhere. I recently thought it was a tube worm not sure if it’s the same.

 

[Maritimer]

Lots of worms live in tubes ... fanworms / feather dusters are among them.

~Bruce