Red Sea Coral Reef, Egypt

The Red Sea Coral Reef in Egypt features uniquely heat-tolerant corals that thrive in waters reaching 34°C, a temperature that would bleach 80% of corals in the Great Barrier Reef (#1). This resilience, 50% higher than the typical tropical reef, makes it a potential refuge as global ocean temperatures rise. A 2022 survey found that 90% of its key species survived a major heatwave, outperforming the average for Indian Ocean reefs by 35%, cementing its role as a critical natural laboratory for coral adaptation.