CNN —For a few days in the southern hemisphere every spring, the world’s biggest and most famous coral reef explodes.
This is coral spawning season – a time when the Great Barrier Reef creates the next generation of corals.
This year’s coral spawning began on November 2.
Coral spawning, which happens ahead of the southern hemisphere’s summer, gives clues about the health of the 133,000-square-mile (345,000-square-kilometer) reef.
“The annual coral spawning is not only one of the most extraordinary natural phenomena on the planet,” says Anna Marsden, managing director of the Great Barrier Reef Foundation.
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