Feather Duster or Aiptaisia

Was wondering if someone could identify what is living in my rock. They are white with red spots and look like fans when they come out of their tubes. I am attaching a picture. Its not great but hopefully will help.

Whatever it is I see lots of them in my rock.

 

From what I can tell in the picture and the description including the tubes I believe it is feather dusters. I dont think aptasia has tubes. Someone else feel free to chime in. BTW feather dusters are OK, actually desirable.

 

my geuss feather duster
but one of the bigwiggs will let u know th right answer

 

I'm not a "bigwig" but that's definitely a feather duster. I've had both in my tank.

 

feather duster. No doubt about it.

 

i agree with everyone else, dusters for sure

 

Tube worms...not aiptasia.

do they look like these :

http://static.flickr.com/3355/3303573839_d29b690d16.jpg

 

Crimson,
that looks like it. I can only see a small portion of the tube
since it is in the substrate. No idea if they are that long or
not.

So is this good bad or don't matter

 

I have several dusters and cant see the pic well...if it is in a tube it is a duster...it is a keeper....

 

Its good. It is a filter feeder, I don't know about how much filtering the tiny ones do but hey every little bit helps I think.