Dive Site: Aljui Bay

About Aljui Bay

Aljui Bay, located in Raja Ampat's remote northern reaches, was discovered as a premier snorkeling and diving destination by chance in 2011. This bay, situated within the broader Raja Ampat archipelago, is globally recognized for its unparalleled marine biodiversity, hosting more documented fish, coral, and invertebrate species per square kilometer than any other location worldwide. The site is characterized by an unusual topography where gorgonian sea fans, typically found at depths of 12-18 meters (40-60 feet), grow robustly even near the surface. The reefs boast an extraordinary array of colors and are considered exceptionally healthy, showcasing coral growth rarely observed elsewhere. While specific seasonal details for Aljui Bay itself are limited, the broader Raja Ampat region, where it is located, experiences optimal diving conditions from October to April, marked by calmer seas, clear waters, and comfortable temperatures. This period also offers peak opportunities for sighting larger marine life across the region. Diving Aljui Bay offers an intimate experience with thriving coral gardens and diverse macro life, making it suitable for both snorkeling and diving enthusiasts. Its protected location within a secluded cove ensures calm conditions, providing a tranquil environment to explore its rich underwater landscape.

Dive site facts: Aljui Bay

Depth

20 m

Current

Mild (within bay), variable regionally

Visibility

10–30 m (regionally)

Water temperature

28–30°C

Entry

Tender

Level

All levels (snorkeling to advanced)

Dive type

Coral garden, macro, reef

Region / port

Raja Ampat, Indonesia

Coordinates

4.6045° S, 123.8996° E

Conditions & Currents

Specific current information for Aljui Bay is not detailed, but it is known as a secluded cove, suggesting generally calm conditions within the bay itself. In the wider Raja Ampat region, currents can vary from gentle to strong depending on tidal phases and specific dive sites, necessitating good buoyancy control and experience. Visibility in Raja Ampat typically ranges from 10 to 30 meters, with better clarity often experienced in the dry season (October-April). Water temperatures consistently hover between 28-30°C, making for comfortable diving. Divers should always consult with local guides regarding conditions on the day, especially when venturing outside the protected bay.

Marine life & sighting chances

Coral species (over 550 types)

common

Fish species (over 1,400 types)

common

Gorgonian sea fans

common

Invertebrates

common

Manta rays

December-April · occasional

Wobbegong sharks

occasional

Pygmy seahorses

occasional

Reef fish schools

common

Dive profile & how the dive runs

Aljui Bay is typically accessed by tender, as it is a secluded cove within the remote northern reaches of Raja Ampat. Dives usually begin with a descent onto the vibrant reef, exploring the unique topography where gorgonian sea fans thrive even in shallow depths. The dive profile generally involves a gentle exploration of the coral gardens, moving along the healthy, colorful reefs. Divers can observe a wide array of macro life and reef fish amidst the unusually dense coral growth. Since specific depths are not detailed, divers can adjust their profile to explore various bands of the reef, keeping an eye out for interesting critters. The sheltered nature of the bay suggests a relaxed dive, suitable for extended bottom times to fully appreciate the rich biodiversity. Safety stops are conducted in the tranquil, shallower waters of the bay before surfacing for tender pickup.

Underwater photography

Aljui Bay's exceptionally healthy and colorful coral growth, particularly the shallow-growing gorgonian sea fans, makes it an ideal subject for wide-angle photography, especially in the shallower sections. A wide-angle or fisheye lens will capture the expansive reefscapes and the unusual prevalence of large fans near the surface. For macro photographers, the bay’s rich invertebrate life offers abundant opportunities; a macro lens with a diopter can highlight the intricate details of small critters nestled among the corals. Natural light is often sufficient in the shallower, clearer waters, but strobes are recommended to bring out the true colors of the corals and marine life, especially at greater depths. Focus on maintaining excellent buoyancy to avoid damaging the pristine, fragile corals. Patience and a keen eye will be rewarded with unique shots of this thriving ecosystem.

Getting there & logistics

Aljui Bay is located in Raja Ampat, Indonesia, which is primarily accessed via Sorong (SOQ) airport. Most divers arrive in Sorong by domestic flight after an international flight to a major Indonesian hub like Jakarta (CGK) or Makassar (UPG). From Sorong, Aljui Bay is typically reached by liveaboard, as it is located in a remote area of northern Raja Ampat. Liveaboard itineraries vary in length, often ranging from 7 to 12 days, and provide access to a wide array of dive sites across the archipelago. The Raja Ampat Marine Park Entry Permit, costing approximately $100 USD, is required for all visitors and supports conservation efforts. Aljui Bay is often combined with other northern Raja Ampat sites on liveaboard routes.

Safety & environment

Diving in Aljui Bay, as part of remote Raja Ampat, necessitates careful safety planning. The nearest recompression chamber is typically located in Sorong, requiring a significant transfer time from Aljui Bay. Divers must carry comprehensive dive insurance that covers emergency medical treatment and evacuation, including air ambulance services. Liveaboards operating in the region usually have trained medical staff and emergency oxygen onboard, but rapid evacuation for severe cases can be challenging due to the remote location. Site-specific hazards in Aljui Bay are generally low due to its sheltered nature, but divers should always be mindful of local conditions. Always follow your dive guide’s instructions, maintain good buoyancy control to protect the pristine corals, and monitor your dive computer closely.

Who it suits — and who it doesn't

FAQ

Aljui Bay FAQ

Liveaboards diving Aljui Bay

These liveaboards may visit Aljui Bay on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Naga Biru

Indonesia

12 guests40 m

$273/day

Ecopro Duyung Baru

Indonesia

6 guests27 m

$361/day

Jaya

Indonesia

14 guests23 m

$280/day

Wellenreng

Indonesia

9 guests25 m

$426/day

Komodo Aggressor

Komodo, Indonesia

16 guests29 m

$312/day

Blue Manta

Indonesia

20 guests45 m

$488/day

Mari

Indonesia

14 guests32.2 m

$327/day

Situju7

Komodo, Indonesia

10 guests32.7 m

$362/day

Pindito

Indonesia

16 guests37.79 m

$533/day

Mermaid II

Komodo, Indonesia

18 guests

$354/day

Pearl of Papua

Raja Ampat, Indonesia

14 guests30 m

$303/day

Putri Naga

Komodo, Indonesia

6 guests25 m

$222/day