Something growing around GSP?

[Idaho Mojo]

Need help identifying this growth around my gsp. Doesnt seem to irritate anything, grows pretty slowly.
Hoping it is harmless as this is a main support rock in the tank and cannot be removed.

Thanks in advance!

 

[Reeferdood]

Beautiful picture!
However, I have no idea what that is. Whatever it is, the GSP are good with it.

 

[Gary S]

Need help identifying this growth around my gsp. Doesnt seem to irritate anything, grows pretty slowly.
Hoping it is harmless as this is a main support rock in the tank and cannot be removed.

Thanks in advance!

I'm certainly not very experienced, but it looks to me that it could possible be dead polyps. It doesn't look like algae, or a sponge...definitely not aptaisia.

 

[Idaho Mojo]

Reeferdood, thanks! Here's a picture of the whole colony. It's only a few months old.

Gary S, I'm not sure that they are dead polyps as they are growing/expanding. They also seem to be branching a little bit as well. Definitely not aptasia as I have dealt with those before. These are white and firmly attached, and do not contract when bothered.

 

[Gary S]

Reeferdood, thanks! Here's a picture of the whole colony. It's only a few months old.

Gary S, I'm not sure that they are dead polyps as they are growing/expanding. They also seem to be branching a little bit as well. Definitely not aptasia as I have dealt with those before. These are white and firmly attached, and do not contract when bothered.

Are they rigid or move?

 

[Idaho Mojo]

Sorry for the double post, wont let me add a picture in editing

 

[Idaho Mojo]

Are they rigid or move?

They are not rigid, they move around with the current

 

[Gary S]

They are not rigid, they move around with the current

Well then it's not a sponge...

 

[Gary S]

Let's see if #reefsquad can get us some answers

 

[Crabs McJones]

Looks like the mouth feeding tentacles of a cucumber or a worm
@KJ thoughts?

 

[Brew12]

Kinda looks like Chondria the way it is structured.

Does it have a reddish tint?

 

[Idaho Mojo]

Kinda looks like Chondria the way it is structured.

Does it have a reddish tint?

Definitely no reddish tint, maybe a little off white.

 

[Idaho Mojo]

Looks like the mouth feeding tentacles of a cucumber or a worm
@KJ thoughts?

If it were a worm or cucumber, would it be possible that it is staying under the mat of the gsp colony?

 

[Crabs McJones]

If it were a worm or cucumber, would it be possible that it is staying under the mat of the gsp colony?

Depended on the worm. Yes