According to scientists from the U.S. National Oceanic and Atmospheric Administration (NOAA) and the International Coral Reef Initiative (ICRI), the world’s coral reefs are currently experiencing another global coral bleaching event. Events like this used to be infrequent, but this is now the second of this magnitude in the last 10 years and the fourth since 1982. Dr Sonia Bejarano from the Leibniz Centre for Tropical Marine Research (ZMT) is part of the Global Coral Reef Monitoring Network which reports how this global ecological crisis is unfolding.