LA Lakers scroll coral polyp extension?

[Rizzle30]

I got this LA Lakers scroll coral about a week ago and did my 10% weekly water change today. When I was finished I noticed this white white thing coming out of where one of the polyps are.

It wasn't there before the water change so I blasted it with some water from a turkey baster thinking it was debris that fell on it. It didn't blow off.

Looking at it closer I'm starting to wonder if it's an extended polyp?

Any thoughts on this?

 

[Rizzle30]

Looked at it a minute ago and its already gone. Polyp probably retracted?