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Undated file photo shows a dugong in the lagoons in New Caledonia, Australia. Australian marine researchers are using drones to locate and study one of nature's shyest animals -- dugongs.(Photo by Christian Grondin/Xinhua)
Undated file photo shows a dugong in the lagoons in New Caledonia, Australia. Australian marine researchers are using drones to locate and study one of nature's shyest animals -- dugongs.(Photo by Christian Grondin/Xinhua)