Spawn or Just a Burp?

So perhaps my tooth coral is digging the new lights. Perhaps it was happy that I fed it a few Mysis shrimp. I'll never know for sure. One polyp of my tooth coral (the right one in the picture below) let loose a cloud of something last night. Was it sperm, eggs or just a big burp?

From Paul's Reef

I noticed this last night as I was observing my tank. The 12000K fluorescents had turned off about half an hour earlier and just the actinics were on. By chance I happened to look at the tooth coral and saw it let go of the cloud. Before it let it go it looked like there was some material hanging out of the mouth. Afterwards, the polyp shrunk down a bit.