A global coral bleaching event is underway, affecting nearly 85% of the world's coral reefs. The U.S. National Oceanic and Atmospheric Administration (NOAA) and the International Coral Reef Initiative report unprecedented levels of heat stress. This is leading to widespread coral bleaching.
Coral bleaching occurs when corals expel algae from their tissues due to heat stress from warming ocean waters. These algae are vital for coral nutrition and color. Prolonged bleaching can lead to coral death.
Climate change has triggered multiple coral bleaching events worldwide. Research indicates that half of the world's coral reefs have already been lost since the 1950s. The current event raises serious concerns about the future of these vital marine ecosystems.