Propagation - fish & corals

Hey all i came down stairs to feed the fish this morning and this is what i found.

I am not sure what was going on (i am referring to the strings coming from the center/mouth) so i grabbed the camera to show you guys and ask the question. Then this afternoon i found this.

Almost looked as if it was puking its guts out literally. Moments later it looks like this.

I had forgot ...