Climate

Global coral reefs get less time to recover as oceans heat up, report finds

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 25/09/2026, 16:09:24 UTC.

Briefings

A comprehensive global assessment released in August 2025 by the Global Coral Reef Monitoring Network found that global hard coral cover declined from 30.2% in 1980-2009 to 27.3% in 2020-2024, representing a 9.5% relative loss. This decline accelerated further to 25.8% in 2024, coinciding with a fourth global bleaching event between April 2023 and mid-2025. The report notes that monitoring began after many reefs had already degraded, and uneven data coverage limits regional comparisons.

Key points

• Global hard coral cover declined from 30.2% in 1980-2009 to 27.3% in 2020-2024, a 9.5% relative loss.
• Hard coral cover dropped further to 25.8% in 2024, coinciding with a fourth global bleaching event between April 2023 and mid-2025.

Context and limitations

Data collection began after many reefs had already degraded, and uneven data coverage limits comparisons across regions.

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