About 9 percent of the world's mapped reefs are found in this region, most of which are located along the Central American coast and off the Caribbean islands.
Over 80 percent of the reefs in this region are at risk, and over half (56 percent) are at high risk.
The Reefs at Risk Threat Index identified about one-tenth of Caribbean coral reefs at very high levels of threat, one-third at high threat, one-fifth at medium threat, and one-third at low threat.
The Caribbean region, as defined by this analysis, encompasses 35 countries and territories bordering the Gulf of Mexico and Caribbean sea, including the oceanic island of Bermuda.
Threats to reefs from coastal development were estimated based on distance from cities, ports, airports, and dive tourism centers, as well as population density, population growth, and tourism growth
Agriculture, though important to economic development and food security, is a source of increased sediment, nutrient, and pesticide runoff.
Threats to reefs from sedimentation and pollution from inland sources were modeled for over 3,000 watersheds discharging into the Caribbean.