As climate change intensifies marine heatwaves around the world, corals are bleaching and dying. Understanding where bleaching is, and is not occurring, and which corals are most affected, is critical to managing and conserving coral reefs.

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As some of the world’s most diverse ecosystems, tropical coral reefs are home to approximately one quarter of all marine species, including fish, invertebrates, algae, and microorganisms. These ecosystems are also highly productive systems, providing food and income for millions of people.