Maratua Island sits off the coast of East Kalimantan, surrounded by deep blue channels that deliver nutrient-rich currents from the open sea. This unique geography makes diving in Maratua Island exceptionally rewarding. Healthy coral formations, strong biodiversity, and limited human activity have preserved the reefs in remarkable condition.

Unlike busier dive hubs in Indonesia, Maratua remains blissfully uncrowded. Divers often find themselves alone on sites that feel completely untouched, allowing for a more authentic connection with the ocean. Whether drifting along vibrant walls or exploring coral slopes, each dive reveals a sense of discovery that is increasingly hard to find elsewhere.

Diving with Sienna Resort Maratua is not about rushing from site to site or following a fixed schedule. Instead, the experience is curated to match the rhythm of island life. With a boutique approach to hospitality, the resort focuses on privacy, comfort, and personalized service.

Small dive groups, flexible planning, and easy access to nearby dive sites allow guests to enjoy more time underwater and less time in transit. From the moment you leave your villa to the moment you return, every detail is handled with care, making your dive in Maratua feel effortless and exclusive.

One of the greatest rewards of choosing to dive in Maratua is the richness of marine life. The surrounding waters are home to an impressive variety of species, from large pelagics to delicate reef inhabitants.

Divers regularly encounter reef sharks cruising through channels, schools of barracuda moving in unison, and graceful manta rays gliding past cleaning stations. Green and hawksbill turtles are common sights, often resting among coral gardens or swimming calmly alongside divers. The reefs themselves are alive with color—hard corals, soft corals, sponges, and macro life create a vibrant underwater landscape ideal for photography and exploration.