Austin Bowden-Kerby, a pioneer in coral reef conservation, spends many of his days gardening corals for reefs around Fiji and the Pacific. He grows corals in ocean nurseries. Once they’re healthy enough, he moves them to outer ocean areas with the hope they will replicate and grow.

“We’re looking at what Mother Nature would do on her own if she had 1,000 years to adapt,” said Bowden-Kerby, who founded the UNESCO-endorsed Reefs of Hope strategy. “We would have these kinds of things happening.”

Bowden-Kerby is one of several scientists trying to conserve, replicate and reproduce heat-resistant corals before climate change wipes them out.

The United States National Oceanic and Atmospheric Administration has said the world is experiencing a fourth global coral bleaching event. They’ve found that bleaching-level heat stress affected almost 85 per cent of the world’s coral reef area between 2023 and 2025.

Bleaching causes corals to lose their food source and, with it, their colour. Most corals survive in temperatures between 20 and 29 C. But as ocean temperatures rise, it’s difficult for many to thrive.

But naturally occurring, heat-resistant corals can survive in waters up to 36 C and potentially higher. They are usually found in warmer waters, like parts of the Pacific Ocean and the Persian Gulf. These corals are increasingly important as sea temperatures rise. So scientists are turning to them to help save declining reefs.

Heat-resistant corals

Corals reefs are extremely diverse places, with around........

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