Scientists say coral ‘pulsing with life and colour’ is 300 years old and three times larger than previous record holder.
Global mean sea levels have risen faster in the 20th century than in any prior century over the past 3,000 years.
The region-wide plan involves the establishment of four training centres across the Pacific with a hub in Brisbane.
Climate change will top the agenda as leaders of 18 nations meet in Tonga from August 26.