It's a delicate spectacle called the coral spawn - a once-a-year phenomenon when Florida's reef-building coral colonies simultaneously release tiny bundles of eggs and sperm. They float to the surface ...

The Great Barrier Reef has "given birth" in its annual coral spawn, creating a cacophony of color on the Australian landmark. Scientists working beneath the waves say they witnessed the event, in ...

Beneath a cloak of darkness, illuminated only by glow sticks and red-filtered flashlights, researchers waited underwater off Key Largo hoping to witness one of the rarest events of sex in the sea.