A widely held view in ocean conservation asserts that parrotfish are key to healthy coral reefs. But evidence suggests that the relationship is more complicated.

Improvements in heat tolerance remain modest compared to future heatwaves.

Coral reefs share genetic material across wide areas, with help from ocean currents. This ability is especially important during episodes like the mass bleaching currently occurring.

This may buy us time, but many reefs are still doomed without serious action on climate change.

Ocean temperatures have hit record highs off the Florida Keys. Scientists and volunteer divers are racing to save these valuable creatures.

Ocean temperatures have hit record highs off the Florida Keys. Scientists and volunteer divers are racing to save these valuable creatures.

Widespread coral bleaching is underway as ocean temperatures hit record highs off the Florida Keys. Scientists and volunteer divers are racing to save these valuable creatures.

Researchers have long suspected that an ingredient in sunscreen called oxybenzone was harming corals, but no one knew how. A new study shows how corals turn oxybenzone into a sunlight-activated toxin.

Marine heatwaves will happen so often that reefs will struggle to weather successive bleaching events.

Hundreds of organizations are working around the world to restore damaged coral reefs. New research shows that rapid ocean warming threatens these efforts.