The Palau island chain consists of about 200 islands located in the western Pacific Ocean. The Palau International Airport on Babeldaob Island, the airports on Angaur Island and Peleliu Island provide regular service to international destinations. Palau is blessed with some of the world's best diving and snorkelling destinations. Scuba diving in Palau is exciting because of the incredible visibility, spectacular species, and wide range of marine life. It features coral reefs, blue holes, plateaus, walls, wartime wrecks, hidden caves and tunnels, more than 60 vertical drop-offs, and huge variety of coral and fish. Palau is also one of the first destinations well-known for mandarin fish dives. There is a range of diving for divers of all levels. Three ocean currents converge in Palau's waters to bring in some of the most varied marine life in the world with more than 1500 species of fish, including dangerous predators in deeper waters and more than 700 species of coral. Some of the marine species are plentiful reef sharks, whale sharks, eagle rays, snappers, jacks, octopi, turtles, barracudas, parrotfish, lionfish, tuna. Scuba diving in Palau is undoubtedly worth the trip. There are more than 30 dive sites in this area, while the most famous are Blue Corner, Blue Holes, German Channel, Ulong Channel, Chandelier Cave, Jellyfish Lake. Dives at some sites, such as Blue Corner, Ulong Channel are usually in strong currents, and that’s why they are among the sites famous for the use of reef hooks in order to remain stationary to view sharks and other large fish. Also, the biological wonder of Palau is Jellyfish Lake, which is filled with nearly 2 million jellyfish that have no sting. The salt water from the ocean seeps through fissures in the limestone into the lake, and other marine life is kept out. There are over 60 wrecks, and worth exploring are Iro Maru, Helmet Wreck, Jake Seaplane.