Dive Site: Batu Bolong

About Batu Bolong

Batu Bolong, meaning "Hollow Rock" in Bahasa Indonesian, is a renowned dive site in Komodo National Park, situated in the central Lintah Strait between Komodo Island and Tatawa Besar. This iconic volcanic pinnacle offers a dramatic underwater landscape often described as a "fish soup" due to its incredible biodiversity. From the surface, it appears as a small rock, but beneath the waves, its walls plunge deeply, boasting vibrant, pristine hard and soft corals that shelter countless marine species. The site is celebrated for its abundant pelagic and reef fish populations. Divers frequently encounter grey and whitetip reef sharks patrolling the drop-offs, along with large schools of barracuda and giant trevally. Napoleon wrasse are common, and both hawksbill and green sea turtles are regular visitors. Eagle rays glide in mid-water, particularly in the latter half of the year, while reef manta rays are occasionally spotted. Schools of anthias, snappers, and fusiliers add to the spectacle, filling the water column, especially on the ocean-facing sides of the pinnacle. Diving Batu Bolong requires experience due to its unique current dynamics. The strong currents of the Lintah Strait hit the pinnacle, creating eddies and challenging conditions. Dives are meticulously planned for the lee (protected) side of the rock, often around slack tide, allowing for a descent into a "safe zone" at approximately 18-20 meters where currents are more manageable. Divers typically zigzag along the reef, moving from deeper sections back into the shallower, richly arrayed coral gardens, which remain vibrant even with strong blue-water currents above. Good buoyancy control, adherence to guide instructions, and drift diving experience are crucial.

Dive site facts: Batu Bolong

Depth

5–35 m

Typical dive

18–20 m

Current

Medium to strong, can be unpredictable and whirlpool-like

Visibility

10–30 m

Water temperature

25–29 °C

Entry

Tender / negative entry on lee side

Level

Advanced, strong buoyancy and drift-diving experience essential

Dive type

Pinnacle, wall, slope, pelagic, reef

Night dive

Not specified

Region / port

Komodo National Park, Central

Coordinates

-8.531, 119.5485

Conditions & Currents

Batu Bolong is known for its strong, complex currents due to its location in the Lintah Strait, often earning it the nickname "Current City." Dives are strictly conducted on the lee side of the pinnacle during slack or gentle tidal exchanges to avoid dangerous conditions, including potential downcurrents and powerful whirlpools visible from the surface. Divers must stay behind their guide, maintain strong buoyancy, and be prepared for drift diving.

Marine life & sighting chances

Napoleon wrasse

September, October · common

Grey reef shark

July, August, September, October · common

Whitetip reef shark

August, September · common

Eagle ray

August, September · common

Hawksbill turtle

July, August, September, October · common

Green sea turtle

July, August, September, October · common

Barracuda

July, August, September, October · common

Reef manta ray

July, August, September · occasional

Giant trevally

common

Tuna

common

Moray eel

common

Sweetlips

common

Dive profile & how the dive runs

Dives at Batu Bolong are meticulously planned around tidal conditions. You will typically enter the water from a tender on the lee side of the pinnacle, between the current lines. Upon descent, proceed directly to a depth of approximately 18–20 meters to reach a more manageable current zone. The dive usually involves zig-zagging across the reef face on the protected side, exploring the vibrant corals and marine life at varying depths. Your dive guide will lead the way, following known current patterns and topography. The pinnacle itself is relatively small, emphasizing the importance of staying close to your buddy and guide. Ascend along the reef line, and always be prepared to deploy a surface marker buoy (SMB) for safety, especially in the event of unpredictable surface currents. A safety stop will be conducted as part of your ascent before surfacing for pickup.

Underwater photography

Batu Bolong is a prime location for wide-angle photography due to its extensive coral coverage, dramatic topography, and abundant schooling fish and pelagic encounters. A wide-angle lens will capture the sheer density of marine life, from swirling anthias to cruising sharks and rays. When photographing pelagics, be prepared for fast-moving subjects. Consider using external strobes to bring out the true colors of the corals and fish, especially in deeper sections or when shooting against the light. For macro enthusiasts, the reef also hosts smaller creatures like nudibranchs and orangutan crabs, requiring a macro lens and careful buoyancy to avoid disturbing delicate corals. Maintaining neutral buoyancy is crucial for both environmental protection and steady shots in potentially strong currents.

Combine with nearby dive sites

• Manta Point (North)

  Manta Point, also known as Karang Makassar, is a renowned dive site in the northern part of Komodo National Park.

• Castle Rock

  Castle Rock, an iconic dive site within Komodo National Park, is celebrated as one of Indonesia's premier destinations for exhilarating…

• Crystal Rock

  Crystal Rock is a renowned dive site in the northern reaches of Komodo National Park, celebrated for its exceptional visibility and the…

• Tatawa Besar

  Tatawa Besar, meaning 'big laugh' in Bahasa Indonesian, is a picturesque dive site located in the central area of Komodo National Park…

• Cauldron (Shotgun)

  The Cauldron, also known as The Shotgun, stands as North Komodo's premier drift dive, celebrated for its dramatic underwater topography and…

Getting there & logistics

Diving Batu Bolong typically occurs as part of a liveaboard itinerary or day trip departing from Labuan Bajo, the main hub for Komodo National Park. Liveaboards offer trips ranging from 3D/2N to over a week, combining Batu Bolong with other prime northern and central Komodo sites. Komodo National Park fees apply, and these are usually included in liveaboard or day trip packages. The nearest airport is Komodo Airport (LBJ) in Labuan Bajo, with connections to major Indonesian cities like Denpasar (Bali) and Jakarta. Due to its central location in the Lintah Strait, Batu Bolong is frequently visited on longer itineraries that explore both the northern and central regions of Komodo, sometimes extending to the south depending on the season and prevailing conditions.

Safety & environment

Diving Batu Bolong requires significant experience due to its strong, often unpredictable currents and proximity to deeper waters. Always adhere strictly to your dive guide’s instructions, as they are expert in reading the intricate current patterns specific to this site. Maintain excellent buoyancy control at all times to avoid accidental contact with the delicate coral reef. Negative entries are common to descend quickly past surface currents. Carry a surface marker buoy (SMB) and know how to deploy it, as current changes can necessitate drift ascents. A reef hook can be used as briefed by your guide to secure yourself during observation. The nearest recompression chamber is located in Denpasar, Bali, requiring air evacuation in case of a serious dive incident. Comprehensive dive insurance, covering medical emergencies and evacuation, is therefore essential for all divers exploring Komodo National Park.

Who it suits — and who it doesn't

FAQ

Batu Bolong FAQ

Liveaboards diving Batu Bolong

These liveaboards may visit Batu Bolong 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

Wellenreng

Indonesia

9 guests25 m

$427/day

Komodo Aggressor

Komodo, Indonesia

16 guests29 m

$312/day

Blue Manta

Indonesia

20 guests45 m

$482/day

Mari

Indonesia

14 guests32.2 m

$328/day

Situju7

Komodo, Indonesia

10 guests32.7 m

$362/day

Pindito

Indonesia

16 guests37.79 m

$533/day

Mermaid II

Komodo, Indonesia

18 guests

$391/day

Putri Naga

Komodo, Indonesia

6 guests25 m

Mikumba Dua

Indonesia

10 guests30 m

$335/day

Aliikai Voyage

Indonesia

15 guests40 m

$658/day