Great Barrier Reef Marine Park Authority on Instagram: "Tonight’s the night!! Coral spawning; the largest reproductive event on the Great Barrier Reef! 🪸 Cued by the lunar cycle, water temperature and tides, corals throughout the Great Barrier Reef will soon simultaneously release bundles of egg and sperm, millions of them! All at once. Stay tuned over the coming days as we watch, and wait, to see the next generation of corals begin life on the Great Barrier Reef! Featuring @masterreefguides Dr