Coral bleaching: 2015 is the hottest year so far, and December 2015 the hottest month since records began in 1880. We found the first coral bleaching on 21st December.
As sea temperature rises corals become stressed and expel the tiny symbiotic algae living inside their tissues. These zooxanthellae give corals their bright colours, so ejecting them leaves the white calcium skeleton ~ we call this impact 'bleaching'.
