As night fell and before the moon had risen, I put on my wetsuit and scuba, picked up my underwater camera, and slowly dove into the sea. In the dark waters, only places illuminated by my dive light could be seen. Although seemingly tranquil, it was actually very lively. Planktons, difficult to observe with naked eyes, were in abundance, attracted to the light. There were also jellyfish, the stings of which are painful to humans. Suddenly, the water became turbid. I focused on the small organism before me, as it released pink gametes, as small as sesame seeds, one after the other, into the sea. The once-a-year coral spawning event was finally here.