Apo Reef in the Philippines is second to the largest atoll-like reef in the world and is the largest one in the country. Its flanking coral reefs are approximately 34 sq. km. in dimension composing of different types and are inhabited by diverse species of fishes and marine life. Some 400 different kinds of coral reefs and 400-500 classes of aquatic animals have been recorded to live there. These are the proof that Apo Reef is a wealth for the underwater life and a natural treasure to every one of us. It is no surprise that scuba divers come from all around the world just to experience the adventure underneath.