Looking for ID. what is this?

[VibingOctopus]

Found this today on my month old Indonesian live rock.

I never noticed it before and I tend to look at the tank closely pretty regularly. Must have popped up sometime this week.

 

[commod0re]

@ISpeakForTheSeas

 

[ISpeakForTheSeas]

@ISpeakForTheSeas

My first thought would be an anemone, but I honestly can't tell from the pics (sorry).

OP, any chance of closer pics?

 

[VibingOctopus]

My first thought would be an anemone, but I honestly can't tell from the pics (sorry).

OP, any chance of closer pics?

Yes, I should have some time later this week to take this rock out and take some closeups! Thanks for helping out!

 

[VibingOctopus]

Update: sorry for the late reply, I have been ill.

Here’s an update to the images. It has grown, shows behaviour of tightening up and pulling in (polyps?) when touched, at night it becomes a tiny nubbin retracting all the way in, and during the day it relaxes out and takes this shape.

 

[Justfebreezeit]

Looks like a Kenya tree

 

[VibingOctopus]

Oh, interesting. I’ve never had that coral in the tank, it must have hitchhiked in on the Indonesian live rock