Stock Photo - Mabul islands palm beach. The Mabul Islands are in the Celebes Sea off the coast of Sabah, Malaysia. The islands feature the palm-fringed beaches of Pulau Mabul Island, Pulau Kapalai and Pulau Sibuan, which offer stunning scenery and excellent opportunities for beachcombing and swimming. The Mabul Islands are renowned for their unique coral reef systems that provide great snorkeling and diving experiences. The waters are also home to various marine life, including several species of manta rays, blacktip reef and nurse sharks, and an abundance of colorful tropical fish. Beach and sunset cruises can also be booked to explore the nearby islands and have a different adventure.