Apo Reef Apo Reef Apo Reef is a coral reef system in the Philippines situated on the western waters of Occidental Mindoro province in the Mindoro Strait. Encompassing , it is by no means the world's second-largest contiguous coral reef system, but is the largest in the country. The reef and its surrounding waters are protected areas in the country administered as the Apo Reef Natural Park (ARNP). It is one of the best known and most popular dive sites in the country. It is listed in the tentative list for UNESCO World Heritage Sites. Apo Reef can be found around west
Kenn Reef 500 km to the southwest. Kenn Reef is part of a submerged continental block, called the Kenn Plateau. The Kenn Plateau lies off the north eastern Australian coast and is a region characterised by a series of prominent, bathymetric troughs and marginal plateaux. And is submerged by 1000 m to over 3000 m of water. The Kenn Plateau, covers around 100,000 km², an area larger than the Tasmanian landmass. Various islands and reefs, whose origin is thought to be related to the Tasmantid Seamount Chain, lie along the western margin of the Kenn Plateau and include the well known Kenn