What in world is this?

[letter4tony]

Take your best shot. It's not a feather duster. It collapses like a polyp (meaning slowly)when touched. We poked at it with a tweezer and it was squishy. We could probably scrape it off....

What is it?

This is the LR flipped on it's side for better picture. Yellow circles are attached to the rock disk, Red circles are attached to the underside of the monti :irked:

Good luck. We're stumped.

 

[reefman]

could be monti eating nudis

 

[D1J8Z]

could be monti eating nudis

I think is is

 

[m'akoyPINOY]

looks like a rock anemone to me!

 

[knugenx]

looks like a rock anemone to me!

+1

 

[letter4tony]

Don't nudibranches move? These dont' move, or make holes in the Monti cap. I've noticed it for a week now.

Also, rock anemone... possible, but I don't see a base, or a mouth. Realyl takes the form of a feather duster... I think I see a new one that I didn't see last time deep in the underside of the monti cap.

Any treatment?