Need ID

[DACJ]

I picked this hammer frag couple weeks ago, this white bony thing was on it and the sales said not to worry, it's not coral's damage, it was already on there before. After a couple days I realize there is something alive in it. It looked like feather duster initially, but then I realized it isnt...it is not round, more like a fan, and only comes out when I feed, unlike feather duster almost out 24/7, and the way it "hunts" for food looks quite aggressive, getting a bit worried since it's a meat eater. Just watch how it comes out to snatch stuff, acutally managed to catch a full size PE mysis, (big) and pulled it in entirely with a couple of moves then stops coming out for like 5 min. Too bad I had stopped recording by then.

Any ideas what this is? good or bad?

Video Here Please ID

[Slyguy00]

Very hard to tell from the video but just looks like some kind of tube worm, I wouldnt be to concerned about it. I have them all over my tank.

[GoFish]

Barnacle perhaps look at the bottom middle picture on THIS page

[Slyguy00]

looks very close for sure

[DACJ]

Just checked out the picture, the description matches almost 100% to the barnacles, andthe base of creature looks exactly the same to the picture you pointed out. Also the hammer is very suppressed as you can see in the vid...not dying tho, so i'll see if hammer will branch off in other directions.

Thanks for the link, great info!