Good topic Nikki. It is really a tough question and hard to really know for sure. With reproduction on one hand you could say yes Reproduction couold be seen as a sign of good health with corals it is further down the energy budjet. But in saying that thier are certain conditions that need to be in play in order to trigger spawning events in regards to corals. So a Coral could be healthy and spawn or it could be in less the good health but have the right precursors available for spawning.
I used to have a moon light on my tank, and every time it would go on my urchins would spawn, this would trigger the clams and so on, it would literaly cloud the tank. It was hard to tell if the corals were also spwning as you couldnt see into the tank. I eventually took the moonlight off.
