Apo Reef of the nearest coast of the Philippine island of Mindoro. It is separated from main island by the Apo East Pass of the Mindoro Strait. Politically, the reef lies within the jurisdiction of the Province of Occidental Mindoro in Region IV-B of the Philippines and more accurately of the Municipality of Sablayan. Tourism activities are administered by local government of Sablayan and the local office of the Department of Environment and Natural Resources (DENR). Apo Reef is roughly a triangular coral atoll formation approximately from the north to the south tip, and from east to west. It is separated by
Apo Island species of coral can be found here, from tiny bubble corals to huge gorgonian sea fans and brain corals. Visitors and tourists pay a fee to enter Apo Island and to snorkel or dive in the marine sanctuary there. These fees are used to keep the sanctuary clean and in good condition. In 2003, Chicago's Shedd Aquarium opened a Wild Reef exhibit based on Apo Island's surrounding reef and marine sanctuary. In 2008, Sport Diver Magazine listed Apo Island as one of the top 100 diving spots in the world. As of 2017, the fish sanctuary, at the southeastern part