ID please - Feather Duster? Tube worm?

[RaymondNoodles]

At first I thought they were aiptasia but when I agitate them, they retract back into their stalk/skeleton which seem to have a somewhat rigid structure such as a feather duster. So I figured I'd just do my best to scrape them off at the base since they're annoying my zoa's, but the stalk bases are kind of buried and difficult to get at.

Thans!

 

[EeyoreIsMySpiritAnimal]

Colonial hydroids most likely, especially if they are bothering your zoas.