What is my mushroom coral doing?

[fishnoob~noclue]

My Ricordea mushroom looks like a bristle worm. It was on the white frag vertically ish and sliding away next another Ricordea. And now look at it

Should I be worried?

Thanks

 

[MoshJosh]

I am not a ricordea expert, but I assume they, like other mushrooms, multiply through pedal laceration? I guess that could be what you are seeing, though that seems like quite the distance for the ricordea to walk with that other piece still attacked. . . Is the body of the mushroom firmly attached to the rock?

 

[City_Boy_Jay]

Really hard to see