ID needed...

[Spork3245]

Hi, I have these green tube-like things growing out of my live rock suddenly. I've never seen them before and my tank is over 2 years old...

Bottom right, next to the discosomas
http://i4.minus.com/ibk6qNUNFFsAqJ.jpg

Under atinic lights:
http://i4.minus.com/ibmmamSnYXYRWE.jpg

Almost looks like small zoas when under the atinic, but are definitely more tube-like and hollow-looking.

What in the world is it? I'm praying it's some type of harmless tube-worm as opposed to an invasive macro-algae :debi:

 

[cloak]

Colonial Hydroids IMO.

 

[Spork3245]

Colonial Hydroids IMO.

Are they good, bad or neutral?

 

[cloak]

They can be irritating to some corals depending on where they are, but they're not really bad. Being that you only have a small patch in what looks to be some prime real estate though, you might want to try and smother them with some epoxy just to be safe. GL.

 

[Spork3245]

They can be irritating to some corals depending on where they are, but they're not really bad. Being that you only have a small patch in what looks to be some prime real estate though, you might want to try and smother them with some epoxy just to be safe. GL.

They're off to the side on a discosoma island a made
But anyway, should I smother them with aiptasia X?