The main reason most visitors come to Cabilao is diving on some of the wonderful reefs that surround the island. On the island are three resorts, that mainly cater to divers, who seek out the undisturbed reefs, the peaceful atmospheer, and especially to see Cabilao's famous shoals of hammerhead sharks.

Around Balicasag Island, you'll find some of the best diving locations in the Philippines. Just in front of the resort, on the south side of the island is also some 400 meters of successfully protected marine sanctuary.

Apo Island is one of the smallest volcanic islands in the Philippines. It is one of the world’s best known marine sanctuaries. It began in the year 1982 with the initiative of Silliman University Marine and Biology Department. It became a protected reserve by the National Integrated Protected Area Act under the jurisdiction of the Protected Area Management Board. Diving in Apo Island is perhaps the best marine adventure in the Visayas Region. Beneath the clear sparkling blue waters of the island lies a breathtaking collection of over 600 documented fish species and 400 varieties of corals.

As a diving destination, Malapascua was "discovered" fairly recently, only in the early 90s. The island was first known for its wide white sand beach, known as Bounty Beach; it has also become known for its beautiful coral gardens and excellent dive spots nearby, including Monad Shoal, an underwater plateau where thresher sharks and manta rays can be sighted on a regular basis. To date, this is the only place in the world where divers can reliably sight thresher sharks.

Tubbataha Reefs Natural Park is home to some of the most beautiful coral reefs in the world. Rising from the volcanic depths of the Sulu Sea in the western Philippines, these magnificent atolls encompass an astonishing diversity of marine life. The park is an underwater sanctuary where nature thrives. Tubbataha is the Philippines' only marine natural park and is also a UNESCO World Heritage Site, a place of global importance being preserved for future generations of humankind. Tubbataha supports an unparalleled variety of marine creatures. Colorful reef fish crowd corals growing in the shallows while sharks and pelagics haunt the steep drop offs to the open sea. A team of rangers are stationed on the reef year-round and, from March until June, divers visit Tubbataha to experience the wonders of this unique underwater world.

A sense of discovery overwhelms one when approaching the eastern municipalities of Alabel, Malapatan and Glan, which face the tranquil waters of Sarangani Bay. These towns have beaches wonderfully preserved by protective coves, and shipwreck diving sites dating back to Spanish times. The bay is more popularly known to be the home of the Sarangani Bay bangus (milkfish). Turn over another stone and one will find that the bay is also home to simple village folk who have lived their lives carving and painting their dreams in the boats they build.

A marine sanctuary where tourists enjoy fish feeding. The Hilutungan, Nalusuan &Talima Islands, with a lots of marine species than the untouched area or reef, but with 5m to 12m depth from surface, its enjoyable only for scuba diving.