What are these?

[rdahlke1105]

I have a ton of these growing on my Tonga rock and have noticed one growing out of the base rock. What are they?

The part with the black arrow pointing moves and the part with the red arrow is hard.

 

[BL1]

I'd say possibly colonial hydroids, I just found some in my tank. I can't really tell what the black arrow is pointing at, does it look something like my picture?

 

[little_fish]

I think they are a type of worm, but i cant remember what its called at the moment.

Do you ever notice thin threads coming from them?

 

[rdahlke1105]

I don't think they are hydroids. I've had a couple of those and these don't look anything like them. I don't see any thin threads coming out of them. What they remind me of is the tube worms that you find near deep sea vents.

 

[rdahlke1105]

I'd say possibly colonial hydroids, I just found some in my tank. I can't really tell what the black arrow is pointing at, does it look something like my picture?

They don't seem to have heads like that.

 

[rdahlke1105]

They kind of remind me of small versions of these. These are the tube worms you find near deep sea vents.

 

[valasaraptor]

vermitied snail there very comon

 

[rdahlke1105]

Let's see if I can get this to work. This is how they move.

 

[the reef kid]

+1 valasaraptor...they are vermetid snails, other than the fact that some corals get annoyed when they get the snail's web, they are harmless.

 

[Piratefish]

Yep I have them in my tank. They do seem to spread fairly fast.

 

[little_fish]

If they get to the point of annoying your corals you can just glue the hole shut.

 

[ErinCahir]

I had to do that recently. It wasn't really annoying the coral as much as it was annoying me with the damn web all the time.
I can't say I've ever seen mine stick out of the tube that far, though. Is the base straight? Or like a curly Q?

 

[rdahlke1105]

The bases are straight and I have not seen any of the web stuff you guys are talking about. I've only noticed them on the Tonga rock and one or two on the base rock.

 

[little_fish]

Give them time, they will spread. But i too have never seen the web stuff, but im sure given time, i will.