The super El Niño is cooking coral reefs — can lullabies and probiotics save them?

Nearly half of coral species are at risk of extinction and the currently developing super El Niño will further war an ocean already heated by ongoing climate change. So researchers are turning to unorthodox ideas to help new corals to settle, grow and thrive. In the Caribbean, underwater speakers serenade tiny larvae, while in Thailand a low-tech coral hotel raises resilient youngsters.

Thumbnail polyps image from: Getty Images / Wild Horizon