Coral bleaching developing at Japan's largest coral reef

Coral bleaching developing at Japan's largest coral reef

Photo taken Sept. 11, 2016, shows Japan's largest coral reef, Sekiseishoko, between Ishigaki and Iriomote islands in the southernmost prefecture of Okinawa. Coral bleaching is developing there, with some coral dying amid high sea temperature. (Kyodo) ==Kyodo

Coral bleaching developing at Japan's largest coral reef

Coral bleaching developing at Japan's largest coral reef

Photo taken Sept. 11, 2016, shows Japan's largest coral reef, Sekiseishoko, between Ishigaki and Iriomote islands in the southernmost prefecture of Okinawa. Coral bleaching is developing there, with some coral dying amid high sea temperature. (Kyodo) ==Kyodo

Coral bleaching developing at Japan's largest coral reef

Coral bleaching developing at Japan's largest coral reef

Photo taken Sept. 12, 2016, shows Japan's largest coral reef, Sekiseishoko, between Ishigaki and Iriomote islands in the southernmost prefecture of Okinawa. Coral bleaching is developing there, with some coral dying amid high sea temperature. (Kyodo) ==Kyodo

Coral bleaching developing at Japan's largest coral reef

Coral bleaching developing at Japan's largest coral reef

Photo taken Sept. 12, 2016, shows Japan's largest coral reef, Sekiseishoko, between Ishigaki and Iriomote islands in the southernmost prefecture of Okinawa. Coral bleaching is developing there, with some coral dying amid high sea temperature. (Kyodo) ==Kyodo

Coral bleaching developing at Japan's largest coral reef

Coral bleaching developing at Japan's largest coral reef

Photo taken Sept. 12, 2016, shows Japan's largest coral reef, Sekiseishoko, between Ishigaki and Iriomote islands in the southernmost prefecture of Okinawa. Coral bleaching is developing there, with some coral dying amid high sea temperature. (Kyodo) ==Kyodo

Coral bleaching developing at Japan's largest coral reef

Coral bleaching developing at Japan's largest coral reef

Photo taken Sept. 12, 2016, shows Japan's largest coral reef, Sekiseishoko, between Ishigaki and Iriomote islands in the southernmost prefecture of Okinawa. Coral bleaching is developing there, with some coral dying amid high sea temperature. (Kyodo) ==Kyodo

Coral bleaching developing at Japan's largest coral reef

Coral bleaching developing at Japan's largest coral reef

Photo taken Sept. 12, 2016, from a drone shows Japan's largest coral reef, Sekiseishoko, between Ishigaki and Iriomote islands in the southernmost prefecture of Okinawa. Coral bleaching is developing there, with some coral dying amid high sea temperature. (Kyodo) ==Kyodo

Coral bleaching developing at Japan's largest coral reef

Coral bleaching developing at Japan's largest coral reef

Photo taken Sept. 12, 2016, from a drone shows Japan's largest coral reef, Sekiseishoko, between Ishigaki and Iriomote islands in the southernmost prefecture of Okinawa. Coral bleaching is developing there, with some coral dying amid high sea temperature. (Kyodo) ==Kyodo

Coral bleaching developing at Japan's largest coral reef

Coral bleaching developing at Japan's largest coral reef

Photo taken Sept. 12, 2016, from a drone shows Japan's largest coral reef, Sekiseishoko, between Ishigaki and Iriomote islands in the southernmost prefecture of Okinawa. Coral bleaching is developing there, with some coral dying amid high sea temperature. (Kyodo) ==Kyodo