A severe coral bleaching event is devastating coral reefs globally, marking an unprecedented ecological crisis. The International Coral Reef Initiative (ICRI) reports that this event, declared in April 2024, continues in 2025, impacting approximately 84% of the world's reefs. This surpasses previous events and highlights the dire consequences of rising ocean temperatures.
What is Coral Bleaching?
Coral bleaching occurs when corals expel the algae (zooxanthellae) living in their tissues due to environmental stressors like high temperatures. These algae provide corals with essential nutrients and their vibrant colors. When corals expel the algae, they turn white and become highly vulnerable to disease and death.
Impact and Affected Regions
As of March 2025, 84% of the world's coral reefs have experienced bleaching-level heat stress. Regions such as the Great Barrier Reef, the Caribbean, and the Red Sea are suffering significant coral deaths. Experts warn that continued global warming could lead to the collapse of coral reef ecosystems worldwide.
Urgent Action Needed
The ongoing bleaching event underscores the urgent need to reduce greenhouse gas emissions and protect these vital ecosystems. Increased collaboration and conservation efforts are crucial to mitigate the impacts of climate change on coral reefs and ensure their survival for future generations.