The beautiful color of corals in the ocean comes from the algae living with them  Among them, zooxanthellae is the most important kind of single-cell algae  They take their own needs and want to provide food for each other  The sea water warming caused by global warming leads to a large number of deaths of zooxanthellae and other algae, which leads to the death of corals themselves and the bleaching of coral reefs
Dead heat-resistant algae have also been found in some albino coral reefs
 However, the study found that, Coral can cope with the challenge of climate warming by selecting other heat - resistant algae