Ocean Warming and Coral Bleaching

Coral reefs survive by hosting tiny algae roommates that photosynthesize and share food.

When ocean temperatures rise just half a degree above 28 Celsius, corals evict their

algae partners in panic, turning ghostly white. This is coral bleaching.

Without their food source, corals starve within weeks. Since the 1980s,

nineteen percent of reefs have already died. Here's the kicker: these underwater

cities cover less than 0.2 percent of our ocean but house thirty percent of all marine species.

They're like tropical rainforests of the sea. The 2016 bleaching event hit ninety

percent of the Great Barrier Reef. Scientists are now racing to grow heat-resistant coral strains in