In a live event from the Great Barrier Reef, witness one of the world's greatest natural spectacles - the annual phenomenon of the majestic mass coral spawn. Hosted by Hamish Macdonald, Brooke Satchwell and Dr Jordan Nguyen.

Watch as corals across the outer reef synchronise their spawn release, while scientists capture the spawn to help regenerate the reef before it's too late. The reef comes alive in a breeding bonanza of fish, birds & turtles.