Kaimana, West Papua, Indonesia
Triton Bay lies on the south coast of West Papua, where forested limestone cliffs drop into green, plankton-rich water. The plankton feeds some of the densest soft coral in Indonesia and brings whale sharks to the fishing platforms offshore.
A Triton Bay liveaboard explores the bays and islands of the Kaimana regency on the southern coast of the Bird's Head region of West Papua, roughly 500 km southeast of Misool. It is one of the newest names in Indonesian diving: the first detailed marine surveys were made only in 2006, and visiting boats are still rare. Neptune reaches Triton Bay on point-to-point routes between the Banda Sea and Raja Ampat, on King Neptune in late 2026 and early 2027 and on Neptune One in November 2027.
Triton Bay is different from the clear-water destinations of eastern Indonesia. Runoff from the rainforest and upwelling from the Arafura Sea keep the water green and full of plankton, which is why soft corals, black coral bushes and sea fans grow here in shallow water. The trade-off is visibility, which is often 8 to 15 m in the bay. Divers combining it with the clear water of Raja Ampat or the Banda Sea see both sides of the region on one trip, and the Indonesia liveaboard guide shows how the routes connect.
The best known reason to visit is the chance to swim with whale sharks around the bagans, the floating fishing platforms of the area, between November and February. The guide to whale sharks in Indonesia compares Triton Bay with Cenderawasih Bay and Saleh Bay.
The Triton Bay season runs from October to April, when the northwest monsoon keeps the south coast of Papua calm. Whale sharks are seen most often from November to February, and the clearest water usually comes in October and November.
From May to September the southeast trade winds blow straight into the south coast, bringing big swell and cool, murky upwelled water, and liveaboards avoid the area. In the season, rainfall in the mountains can lower the visibility inside the bay after heavy storms.
Neptune's boats visit Triton Bay in late October and November, when they move from the Banda Sea to Raja Ampat for the winter, and King Neptune adds a Kaimana to Sorong trip in January 2027.
The best known Triton Bay dive sites are the soft coral reefs around Aiduma Island, such as Larry's Heaven and the Black Forest, along with the whale shark bagans and the walking shark night dives around Namatota.
Named after Larry Smith, the dive guide who pioneered many sites in eastern Indonesia, this reef is covered in pink, orange and purple soft coral, with dense schools of glassfish and fusiliers.
A slope of black coral bushes that grow unusually shallow because of the low light, sheltering longnose hawkfish and small fish.
A rich, current-fed reef that reminds visiting divers of Komodo, with schooling fish, sweetlips and grouper.
A pinnacle covered in red and white soft coral that gave it its name, with groupers, barramundi cod and schools of snapper.
Floating fishing platforms where whale sharks come to feed on the small fish the fishermen catch with lights at night. Visits are made at first light.
Shallow reefs where the Triton Bay epaulette shark, described in 2008, walks across the bottom on its fins after dark.
Triton Bay has some of the densest soft coral in Indonesia because its water is full of plankton. Soft corals such as Dendronephthya do not depend mainly on sunlight like hard corals do; they feed by catching plankton from the current, so green, nutrient-rich water suits them.
The low light also allows species that usually live deep to grow near the surface. Black coral bushes, normally found below 30 m, can be seen here at 10 to 15 m. The result is a reef that looks very different from the clear-water reefs of Raja Ampat, a few hundred kilometres to the north.
Surveys led by Conservation International in 2006 recorded several fish species new to science in the Kaimana area, including the Triton Bay walking shark, and helped establish the regency's marine protected area network.
In the Kaimana area, whale sharks gather at bagans, floating fishing platforms that use lights to attract small fish at night. The sharks have learned to feed on the catch, and fishermen allow visitors to swim with them in the early morning.
Sightings are most common from November to February and are often better around the dark moon, when the bagans catch more fish. Encounters happen at the surface and in the top 15 m, so snorkellers can join too. Visitors should keep 3 m away, never touch the sharks and avoid flash photography.
The limestone cliffs of Triton Bay carry prehistoric rock paintings, including hand stencils and figures in red ochre, painted on overhangs just above the waterline. Their age has not been precisely dated, but similar art elsewhere in the region is thousands of years old.
Kaimana itself is a small port town known across Indonesia for its sunsets, celebrated in the popular song Senja di Kaimana. Liveaboard guests usually pass through only on arrival or departure day.
Triton Bay is known for whale sharks, soft coral and black coral, the endemic Triton Bay walking shark, big schools of fish and a strong mix of macro life.
| Species | Where | When | Notes |
|---|---|---|---|
| Whale sharks | Bagans near Namatota and East Kaimana | November to February | Best around the dark moon |
| Triton Bay epaulette shark | Shallow reefs | Year-round | Endemic, seen on night dives |
| Soft and black coral | Aiduma, Christmas Rock | Year-round | Dense in shallow water |
| Glassfish and fusiliers | Most reefs | Year-round | Huge schools |
| Groupers and barramundi cod | Pinnacles | Year-round | Common thanks to protection |
| Pygmy seahorses and nudibranchs | Sea fans and slopes | Year-round | Rich macro life |
King Neptune visits Triton Bay in late October and early November 2026 and January 2027, on routes between the Banda Sea and Raja Ampat. Neptune One follows the same path in November 2027 and 2028.
46 m steel and aluminium yacht, 10 cabins, 20 guests, Nitrox included
King Neptune stops in Kaimana between the Banda Sea and Raja Ampat seasons.
| Itinerary | Route | Nights | When |
|---|---|---|---|
| Banda Sea - Triton Bay | Ambon to Kaimana | 10 | 25 Oct 2026 |
| Triton Bay - Raja Ampat | Kaimana to Sorong | 10 | 6 Nov 2026 |
| Kaimana - Sorong | Kaimana to Sorong | 7 | 11 Jan 2027 |
39 m traditional phinisi, 8 cabins, 16 guests, renovated 2025
Neptune One links the Banda Sea, Triton Bay and Misool on consecutive trips.
| Itinerary | Route | Nights | When |
|---|---|---|---|
| Banda Sea - Triton Bay | Ambon to Kaimana | 10 | 6 Nov 2027, 29 Oct 2028 |
| Triton Bay - Misool | Kaimana to Sorong | 10 | 18 Nov 2027, 10 Nov 2028 |
Triton Bay trips start or end in Kaimana. Fly to Utarom Airport (KNG), usually via Ambon or Sorong; the boat collects guests at the airport or local hotels before 12:00 on day one.
International arrivals connect through Jakarta (CGK) or Bali (DPS).
Fly to Ambon (AMQ) or Sorong (SOQ), the main hubs for this part of Indonesia.
Small aircraft connect Ambon and Sorong with Kaimana (KNG). Flights are limited and can change at short notice.
Pick-up from Kaimana airport or hotels before 12:00. Trips from Ambon to Kaimana end with checkout by 10:00 in Kaimana.
Because there are few flights, it is wise to arrive a day early and to keep the return flight flexible. Divers on routes that end in Sorong fly home from Domine Eduard Osok Airport (SOQ). Remember the 24-hour gap before flying after the last dive, explained in the guide to flying after scuba diving.
Departure towns and airports may change, and this information is for guidance only. The confirmed departure and return details for each trip are provided during the booking process.
October to April is the season. Whale sharks are seen most often from November to February.
Yes. Whale sharks feed around the bagans, floating fishing platforms, especially from November to February. Encounters are frequent but not guaranteed.
The water is rich in plankton from rainforest runoff and upwelling. The same plankton feeds the soft corals, so visibility of 8 to 15 m is normal in the bay.
Triton Bay is in the Kaimana regency on the south coast of West Papua, roughly 500 km southeast of Misool.
Fly to Kaimana (KNG) via Ambon or Sorong. Neptune boats collect guests at Kaimana airport or hotels before noon.
It is a small epaulette shark, Hemiscyllium henryi, that walks along the reef on its fins. It was described in 2008 and is found only in this region.
King Neptune visits in October, November and January in the 2026 to 2027 season. Neptune One visits in November 2027 and 2028.
Yes. Routes from Kaimana to Sorong combine Triton Bay with Misool or the wider Raja Ampat area.
Advanced Open Water certification with a minimum of 25 logged dives is recommended. Currents are usually mild, but lower visibility calls for good buoyancy and staying close to the guide.
No. Only a handful of liveaboards visit each season, and there are very few land-based dive operations.
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Schedule and fees checked: October 2026
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