Topic: oceans

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• View global map of threats to coral reefs

The coral reefs in Southeast Asia are the most threatened in the world.

The coral reefs of Australia are the least affected by local threats (i.e., coastal development, overfishing/destructive fishing, marine-based pollution, and/or watershed-based pollution) of any regio

There are an estimated 2,679 marine protected areas (MPAs) in coral reef areas worldwide, encompassing approximately 27 percent of the world’s coral reefs.

Major coral reef regions of the world as defined for summary statistics in the Reefs at Risk Revisited analysis.

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Blast and poison fishing occurs primarily in Southeast Asia, the western Pacific, and eastern Africa. Areas of threat shown here are based on survey observations and expert opinion.

This map provides an indication of the broad patterns of coral disease around the world. However, many coral reef locations are unexplored and not all observations of coral disease are reported.

The map depicts the frequency of future bleaching events in the 2030s and 2050s, as represented by the percentage of years in each decade where a NOAA Bleaching Alert Level 2 (i.e., severe thermal str

Coral reefs are classified by estimated present threat from local human activities, according to the Reefs at Risk integrated local threat index.

To evaluate change in pressure on coral reefs since 1998 (the year the first Reefs at Risk was published), Reefs at Risk Revisited undertook a separate comparative analysis using the 1998 modeling met

The assessment of the adaptive capacity of countries and territories to reef loss is based on economic resources, education, health, governance, access to markets, and agricultural resources.