What is this?

[Xj reefing]

The other day I noticed on my gsp some sort of brown growth like a polyp that never seems to close and I don’t think it is aptasia. Could it just be a brown gsp polyp? 

[M. Tournesol]

31 minutes ago, Xj reefing said:

brown growth like a polyp that never seems to close and I don’t think it is aptasia.

But it does look a lot like an aptasia.

Pocking it with a stick don't close it ? 

31 minutes ago, Xj reefing said:

Could it just be a brown gsp polyp? 

🤨 GSP polyp seems to have 8 tentacles. Your brown thing have more than 8.

[DaJMasta]

Definitely looks like a pest nem to me, probably aiptasia, but there should be some things you can check and be sure:

If you poke it, does it retract quickly and does it leave any kind of stalk/shell/tube or does it just roll down into a little outie belly button thing.  Quickly and the latter is a nem.

Has it moved to a different place?  Yes is a nem.

[seabass]

6 hours ago, M. Tournesol said:

it does look a lot like an aptasia

I was thinking a majano anemone (still considered a pest).

[Xj reefing]

I thought it looked like some pest nem but I was not sure. If it is a majano how should I get rid of it

[seabass]

23 minutes ago, Xj reefing said:

If it is a majano how should I get rid of it

Any of the aiptasia methods should work.  For example, Aptasia X or super gluing over it after it has retracted; they even sell majano wands.  If trying to kit it; I might touch it, so that it retracts, and then use superglue gel to cover over it.

 

That said (and the fact that they are usually considered a pest), some people decide to keep majano anemones.  They are not quite as bad as aiptasia.

[Ratvan]

If it is a Majano i'd be tempted to try and cut it out the main mat, see if anyone would want it. I'm too far away but looks interesting enough to try and save