Holbourne Island

Surveys at Holbourne Island have shown low macroalgae levels and about twice as much hard coral as Camp Island. TC Debbie caused a major loss of hard coral, wiping out over 75% with low recovery observed. In 2020, the sites monitored were changed to focus on more active communities, where surveys have observed some stability at 20% and 26%.

The major bleaching event of 2020 led to significant damage to Holbourne Island hard coral communities. The warming in early 2024 was stronger than at Camp Island but did not cause major coral loss. Damage from predation and disease, whilst low levels, has been consistently recorded.