Sangalaki Island Manta Point

Berau · East Kalimantan · Indonesia

Sangalaki Island is the jewel of the Derawan Archipelago, a tiny coral island off East Kalimantan's coast where reef manta rays gather in numbers that rival the world's most famous manta aggregation sites. The island sits within a marine reserve, uninhabited and protected, its shallow coral plateaus serving as one of Asia's most important manta cleaning and feeding stations. For divers seeking intimate, eye-level encounters with these gentle giants in warm, shallow water, Sangalaki delivers with a consistency that is genuinely remarkable. The dive is beautifully simple. You drop into water that is rarely deeper than 15 meters over a coral plateau dotted with bommies and cleaning stations. Within minutes, the first manta appears, gliding in from the blue with a wingspan of three meters or more, heading directly for a coral head where cleaner wrasse wait. The manta hovers, gill slits flared, as tiny wrasse dart over its body removing parasites. Then another arrives. And another. On peak days, twenty or more mantas circle the cleaning stations in a slow, orbital ballet, stacking at different depths and occasionally barrel-rolling to present their ventral sides to the cleaners. What makes Sangalaki exceptional is not just the numbers but the proximity. The shallow depth means you can kneel on a sandy patch at eight meters and watch mantas pass within arm's reach, their dark dorsal surfaces giving way to the unique spot patterns on their white bellies that researchers use for individual identification. Some individuals are so habituated to diver presence that they approach voluntarily, veering from their cleaning circuit to make a slow pass directly over your head. The sensation of a three-meter manta ray gliding a meter above you, close enough to see the remoras clinging to its underside, is one of diving's most profound experiences. Sangalaki also serves as a critical nursery. Pregnant females with visibly distended bellies frequent the cleaning stations, and juvenile mantas with wingspans under two meters are regularly observed. Green and hawksbill sea turtles share the reef, and Sangalaki's beaches are among the most important turtle nesting sites in all of Borneo. Between manta dives, the island's surrounding reef offers gentle exploration over hard coral gardens populated by blue-spotted stingrays, cuttlefish, and schools of bumphead parrotfish. Visibility at Sangalaki ranges from 10 to 20 meters, occasionally reduced by the plankton-rich water that draws the mantas in the first place. Water is consistently warm at 27 to 30 degrees. The site's shallow profile and mild currents make it accessible to certified beginners, though disciplined buoyancy control is essential to avoid disturbing the mantas or damaging the cleaning stations.