Help Id'ing This Critter

[3sgterror]

I'm not sure exactly what this is our where it came from. I just noticed it tonight. It glows a little under blue lights.

I looked through the critter id thread and couldn't decide if it was a feather duster or a hydroid.

It seems to be attached directly to the rocks with no tube that I can see.

Thoughts?

 

[JGT]

Duster, good guy.

 

[3sgterror]

Duster, good guy.

perfect! Thanks for the response.