The tropical lagoons and coral reefs of New Caledonia are an outstanding example of high diversity coral reef ecosystems and form one of the three most extensive reef systems in the world. They still display intact ecosystems, with healthy populations of top predators, and a large number and diversity of large fish. This beauty continues below the surface with dramatic displays of coral diversity, massive coral structures, together with arches, caves and major fissures in the reefs. The coral reef complex has a great diversity of forms including all the major reef types from fringing reefs to atolls, as well as associated ecosystems in both coastal and oceanic situations. Continued efforts to protect and manage the property and its surroundings are required to maintain the present intactness of the coral reef ecosystems.