Most Great Barrier Reef coral studied this year was bleached

  • This photo supplied by the Great Barrier Reef Marine Park Authority (GBRMPA) shows diseased corals at a reef in the Cairns/Cooktown on the Great Barrier Reef in Australia, April 27, 2017. More than 90% of Great Barrier Reef coral surveyed in 2022 was bleached in the fourth such mass event in seven years in the world’s largest coral reef ecosystem, Australian government scientists said in its an annual report released late Tuesday, May 10, 2022. (N. Mattocks/GBRMPA via AP)

  • In this photo supplied by the Great Barrier Reef Marine Park Authority (GBRMPA), a diver swims past coral on the Great Barrier Reef in Australia, Oct. 18, 2016. More than 90% of Great Barrier Reef coral surveyed in 2022 was bleached in the fourth such mass event in seven years in the world’s largest coral reef ecosystem, Australian government scientists said in its an annual report released late Tuesday. (M. Curnock/GBRMPA via AP)

CANBERRA, Australia — More than 90% of Great Barrier Reef coral surveyed this year was bleached in the fourth such mass event in seven years in the world’s largest coral reef ecosystem, Australian government scientists said.