Worms looking like pulsing Xenia's are taking over my tank

[LeoE]

Hello there! I have a weird looking animal looking like a pulsing Xenia on my life rock and slowly expanding on over my normal rock work. It creates little tunnels wich makes it look like some kind of worm but im fairly new to aquariums so I have no clue what this could be. I have a video wehe you can see 4 of them(two pretty small ones and two big ones. Pleas help me I'm slowly freaking out because one auf those things have also saddled on one of my snails

 

[LeoE]

Heres the video I thing the first upload did not work

 

[User1]

That is a pretty high quality video btw. Are you able to take a snapshot of it and circle that item in question? I see a feather duster or equivalent there. A few just above the hermit crab. In red?

I went ahead and grabbed a capture. The white tube thing is a feather duster I believe.

 

[LeoE]

That is a pretty high quality video btw. Are you able to take a snapshot of it and circle that item in question? I see a feather duster or equivalent there. A few just above the hermit crab. In red?

I went ahead and grabbed a capture. The white tube thing is a feather duster I believe.

yes those things what are these?

 

[SAWFISH]

I agree that it looks like a feather duster from the snapshot that @saf1 posted. I think it could also be hydroids like in this post https://www.reef2reef.com/threads/hydroids-or-tube-worms.382218/

 

[User1]

I agree that it looks like a feather duster from the snapshot that @saf1 posted. I think it could also be hydroids like in this post https://www.reef2reef.com/threads/hydroids-or-tube-worms.382218/

Good link. And agree - either of these will get you on the right track.