Coral reefs face desperate struggle By KARL WILSON in Sydney | China Daily | Updated: 2021-08-03 08:19 Share CLOSE Kay Davis conducts a survey on the seabed off Heron Island in the Great Barrier Reef, Australia, on Dec 2. ASHLY MCMAHON/FOR CHINA DAILY Climate change takes its toll on marine ecosystems From the Aleutian Islands off the coast of Alaska to the warm waters of the Caribbean Sea, Southeast Asia and the Red Sea, coral reefs swarm with colorful marine life. However, these great natural wonders of the world face an uncertain future due to climate change. The biggest coral reefs are found in the clear, shallow waters of the tropics and subtropics. The largest of these, Australia's Great Barrier Reef, is more than 2,400 kilometers long and is causing significant concerns for the United Nations Educational, Scientific and Cultural Organization's Heritage Committee.