Mushroom coral with green guts

[corals.la]

Hey all! My mushroom has green squiggly stuff coming out of the center. This is one of the two pieces that the mushroom split into about 2-3 weeks ago. What’s the green stuff in the center? What’s happening to the mushroom when this is happening? (See picture attached)

 

[McCarrick]

Hey all! My mushroom has green squiggly stuff coming out of the center. This is one of the two pieces that the mushroom split into about 2-3 weeks ago. What’s the green stuff in the center? What’s happening to the mushroom when this is happening? (See picture attached)

I have had this happen with mine. It usually has been poop.
Or if the coral gets bumped I've seen it do that but never have any issues.

 

[corals.la]

It must’ve been grazed by something because the green part of its center inverted back into the mushroom. Thanks for your input!

 

[MERKEY]

Mine do this every time I move them.

Their way of saying they are mad.