The Status of Coral Reefs of the World: 2020 report, produced by the Global Coral Reef Monitoring Network (GCRMN) under the International Coral Reef Initiative (ICRI), provides a comprehensive assessment of the health and trends of coral reefs globally. The report highlights that coral reefs, despite covering only 0.2% of the seafloor, support at least 25% of marine species and provide essential services to millions of people. However, coral reefs are among the most vulnerable ecosystems to human-induced pressures, including climate change and ocean acidification, as well as local impacts like land-based pollution. The report is based on a global dataset of nearly 2 million observations collected from over 12,000 sites in 73 countries over 40 years. It reveals that coral reefs have experienced significant declines, with the global average hard coral cover dropping from over 30% before the 1998 mass bleaching event to around 16.3% by 2019. The 1998 event alone killed approximately 8% of the world's coral, and subsequent bleaching events between 2009 and 2018 caused an additional 14% loss. The report also notes a 20% increase in algae cover on coral reefs in 2019 compared to 2010, which is a recognized indicator of stress on coral reefs. The report emphasizes that large-scale coral bleaching events, driven by elevated sea surface temperatures, are the greatest threat to coral reefs. These events have led to a progressive decline in coral cover, with some regions showing recovery but others experiencing continued loss. The East Asian Seas region is an exception, with coral cover increasing in 2019 compared to 1983. However, recent bleaching events have begun to overwhelm the natural resilience of reefs in this region. The report underscores the urgent need for action to address the threats facing coral reefs, including reducing greenhouse gas emissions and enhancing reef resilience. It calls for ambitious but realistic targets based on scientific evidence to ensure the long-term survival of coral reefs. The findings highlight the critical role of global cooperation and scientific research in protecting these vital ecosystems.The Status of Coral Reefs of the World: 2020 report, produced by the Global Coral Reef Monitoring Network (GCRMN) under the International Coral Reef Initiative (ICRI), provides a comprehensive assessment of the health and trends of coral reefs globally. The report highlights that coral reefs, despite covering only 0.2% of the seafloor, support at least 25% of marine species and provide essential services to millions of people. However, coral reefs are among the most vulnerable ecosystems to human-induced pressures, including climate change and ocean acidification, as well as local impacts like land-based pollution. The report is based on a global dataset of nearly 2 million observations collected from over 12,000 sites in 73 countries over 40 years. It reveals that coral reefs have experienced significant declines, with the global average hard coral cover dropping from over 30% before the 1998 mass bleaching event to around 16.3% by 2019. The 1998 event alone killed approximately 8% of the world's coral, and subsequent bleaching events between 2009 and 2018 caused an additional 14% loss. The report also notes a 20% increase in algae cover on coral reefs in 2019 compared to 2010, which is a recognized indicator of stress on coral reefs. The report emphasizes that large-scale coral bleaching events, driven by elevated sea surface temperatures, are the greatest threat to coral reefs. These events have led to a progressive decline in coral cover, with some regions showing recovery but others experiencing continued loss. The East Asian Seas region is an exception, with coral cover increasing in 2019 compared to 1983. However, recent bleaching events have begun to overwhelm the natural resilience of reefs in this region. The report underscores the urgent need for action to address the threats facing coral reefs, including reducing greenhouse gas emissions and enhancing reef resilience. It calls for ambitious but realistic targets based on scientific evidence to ensure the long-term survival of coral reefs. The findings highlight the critical role of global cooperation and scientific research in protecting these vital ecosystems.