Global coral reef coverage risks irreversible decline, new report warns

What the report says

A new report from the Global Coral Reef Monitoring Network says coral reefs are bleaching so often that many systems may not have enough time to recover between events, raising the risk of an irreversible global decline. Al Jazeera reported the warning on 31 August 2026, citing scientists who said the current pace of bleaching is unprecedented compared with earlier decades.

The report says global coral cover is now far below normal levels. Bleaching happens when corals lose the algae that help sustain them, leaving them more exposed to disease and starvation. Manuel Gonzalez Rivero, a lead author and scientist at the Australian Institute of Marine Science, said reefs can recover if conditions improve, but that repeated heat-driven events have become much more frequent. He noted that coral cover was relatively stable for about 40 years before a sharp change after 2010.

The article also highlights the scale of recent damage: the 2023 bleaching event was described as the most extensive on record, affecting 77 percent of the world’s coral reef areas. Gonzalez Rivero warned that another major episode is very likely this year because ocean temperatures remain elevated. Coral reefs occupy less than 1 percent of the ocean floor but support more than a quarter of marine life, making them an important indicator of broader ocean health.

Al Jazeera also noted the warning was released as Pacific leaders prepared for a regional summit where climate change and ocean health are expected to remain major issues.