I have no idea as I was not there I was just putting the idea out there for people to think about. The start is unknown I think, the coral that was observed at 11:00am was a completely different coral. It could have started at any time and was noticed at a later time we do not sit there and watch our tank 24/7.The coral in question was noticed at 7:00am so it could have started in the middle of the night as far as we know. It does look like spawning coral from the pic's. I do not know for sure as I was not there, but any pic's I have seen of spawning coral look very much like this.

Bill