Found on a rock in the back of my tank

[Bounce House Corals]

Any ID on this critter?

 

[EeyoreIsMySpiritAnimal]

Can you be more specific? What exactly are you asking about? A description as well as a pic of it in water might help.

 

[EeyoreIsMySpiritAnimal]

If you're asking about the tubes, they look like feather dusters to me (dead or alive)

 

[Bounce House Corals]

Yea sorry, the brown tubes specifically. They all seem to run back to a central crack in the rock. removed the rock to be safe

 

[BeanAnimal]

Just some variety of tube worm, filter feeder… likely harmless