Recently, the international community of science has launched the project “Coral Triangle Initiative”. A triangular area has been identified, with its heart in East Indonesia, where reefs have the highest biodiversity in the world. The demarcation lines of the biggest marine reserve in the world and rules for its protection were defined. Due to the fact that Aurora cruises right inside this Golden Triangle of coral reefs, we wish to provide on this page some information about the extraordinary diversity of the Indonesian seas and their historic and geographical backgrounds.