Belongas Bay: The Crack Dive Site – South Lombok

Site Overview

The Crack is one of the most unique and adventurous dive sites in southern Lombok, featuring a dramatic narrow fissure in the limestone coastline that divers can swim through in a thrilling drift experience. The crack extends approximately 30 meters through the rock formation, with walls on either side covered in colorful sponges, soft corals, and invertebrates that glow under torch light. The current accelerates through the narrow passage, creating a gentle but exciting drift that carries divers through the formation. Large moray eels, lobsters, and various species of nudibranchs inhabit the crevices and ledges inside the crack, while schools of fusiliers and anthias congregate at the entrance and exit where the light is strongest. The surrounding outer wall offers additional diving with prolific coral growth, grey reef sharks, and schooling reef fish. The geological formation itself is the main attraction, with the narrow walls creating dramatic perspectives and light effects that are a photographer's dream. The Crack requires advanced diving skills due to the overhead environment, strong current inside the passage, and exposed ocean position. The site is best suited for adventurous divers who enjoy unique topographical features and are comfortable in confined underwater environments. The transition from the open ocean into the narrow limestone corridor is striking, as the surge and swell of the Indian Ocean are replaced by a more directed, purposeful flow of water that guides you through the heart of the rock.