Southeast Asian seas support over 450 species of scleractinian corals, the western Indian Ocean around 200, and the Caribbean only 50 species1). Variation in reef fish and non-coral invertebrate diversity follosw a similar biogeographic pattern2). Overall, the coral reef communities of Southeast Asian seas are the most diverse in the world, with the Sulu, Sulawesi, Banda, and Coral sea ecoregions being the most diverse on Earth3).
The largest barrier reef in the world is the Great Barrier Reef. Other world-class barrier reefs include the barrier reefs of New Caledonia, the Mesoamerican barrier reef, and the large barrier reefs of Fiji. The largest coral atoll complexes occur in the Maldive-Lakshadweep ecoregion of the central Indian Ocean and in Micronesia.
In this habitat are the following ecoregions:
(217) Nansei Shoto
(218) Sulu-Sulawesi Seas
(219) Bismarck-Solomon Seas
(220) Banda-Flores Sea
(221) New Caledonia Barrier Reef
(222) Great Barrier Reef
(223) Lord Howe-Norfolk Islands Marine
(224) Palau Marine
(225) Andaman Sea