What is the name of the region with the highest coral reef biodiversity?

The Coral Triangle is the region with the highest coral reef biodiversity in the world.

This roughly triangular marine region covers parts of Indonesia, Malaysia, the Philippines, Papua New Guinea, the Solomon Islands, and Timor-Leste. It lies between the Indian and Pacific oceans and contains exceptionally varied habitats, including coral reefs, mangroves, seagrass beds, islands, and deep-water passages.

The Coral Triangle contains more than 76% of the world’s shallow-water reef-building coral species and the greatest diversity of coral reef fishes. Its most celebrated biodiversity centres include Raja Ampat in Indonesia and the Verde Island Passage in the Philippines. Scientists identify the region using measures such as coral-species richness, reef-fish diversity, and habitat complexity.

The Caribbean and Red Sea are important reef regions, while the Great Barrier Reef is the world’s largest coral reef system. Neither is the global centre of coral diversity. The Coral Triangle is sometimes called the “Amazon of the seas,” reflecting its extraordinary concentration of marine life and its importance to coastal communities.