Corals survived past climate changes by retreating to the deeps

Scientists have found that the 2023 marine heat wave caused “functional extinction” of two Acropora reef-building coral species living in the Florida Reef, which stretches from the Dry Tortugas National Park to Miami.

“At this point, we do not think there’s much of a chance for natural recovery—their numbers are so low that successful reproduction is incredibly unlikely,” said Ross Cunning, a coral biologist at the John G. Shedd Aquarium.

This isn’t the first time corals have faced the borderline of extinction over the last 460 million years, and they have always managed to bounce back and recolonize habitats lost during severe climate changes. The problem is that we won’t live long enough to see them doing that again.

Killer heat waves

Marine heat waves kill corals by messing with t