Dive Site: The Four Brothers

About The Four Brothers

The Four Brothers, also known as "Quattro Fratelli," is a distinctive dive site located within the Mitsio Archipelago, north of Nosy Be in Madagascar. This remote collection of four volcanic rock formations, rising from the sea, creates a unique underwater landscape renowned for its pristine ecosystems. The site is a prime example of healthy Indian Ocean reefs, preserved by its isolation from mass tourism. Its dramatic topography includes vertical walls, volcanic structures, caves, and expansive soft coral carpets. Diving here offers encounters with a diverse array of marine life. Expect to see numerous reef fish, various moray eels, turtles, and rays frequently. Seasonally, the site attracts larger pelagic species such as leopard sharks, manta rays, and whale sharks, particularly during specific months. From July to September, the underwater soundscape is often filled with the distant songs of humpback whales. The dive experience at The Four Brothers typically involves exploring depths from shallow areas to over 30 meters, navigating along rich walls and through fascinating volcanic formations. Dive operators in the area prioritize daily site selection based on current conditions to optimize the experience. Access is primarily via short boat rides from nearby resorts or liveaboards, making it convenient for multiple daily dives.

Dive site facts: The Four Brothers

Depth

5–30 m

Typical dive

12–25 m, 50–60 min

Current

Mild to strong, site-dependent

Visibility

10–50 m

Water temperature

25–28°C

Entry

Boat

Level

All levels, current experience helpful for some sites

Dive type

Reef, drift, macro, pelagic

Night dive

Possible on request

Region / port

Nosy Be / Mitsio archipelago

Coordinates

13.0642° S, 47.9300° E

Conditions & Currents

Currents at The Four Brothers are variable, ranging from mild to strong depending on the specific site and tidal influences, necessitating an understanding of local conditions. Operators frequently choose dive locations daily to align with the best current and visibility, often facilitating drift dives. While some sections, like the 'First Brother,' can be explored comfortably in moderate currents, other areas around the 'Four Brothers' may experience stronger flows, requiring divers to be prepared. Experienced guides provide thorough briefings and manage entries and exits for safety. Visibility typically spans from 10 to 50 meters, though plankton blooms, particularly in June and July, can reduce clarity while simultaneously increasing chances of pelagic encounters.

Marine life & sighting chances

Nudibranch

common

Pipefish

common

Ribbon moray eel

occasional

Glassfish

common

Cleaning shrimp

common

White-tip shark

occasional

Leopard shark

occasional

Whale shark

October–November · occasional

Manta ray

October–November · occasional

Humpback whale

July–September · occasional

Parrotfish

common

Green sea turtle

occasional

Hawksbill sea turtle

occasional

Trevally

occasional

Dive profile & how the dive runs

Dives at The Four Brothers typically commence with a short boat ride, usually under 15 minutes, from the nearby resort. Entry is often a backward roll or giant stride directly into the water, followed by a descent along the vertical walls and volcanic formations. A common dive might begin at the "Second Brother" (Betalinjona), descending to depths of 14–28 meters to explore expansive soft coral carpets, often described as an underwater cotton field. Divers then gradually ascend, tracing the contours of the rocks and walls, focusing on spotting macro life such as nudibranchs and pipefish within the faults and crevices. The dive progresses to shallower areas, sometimes as little as 5 meters, to maximize bottom time and explore caves and arches. For instance, the "First Brother" (Beangovo) offers exploration around 20 meters, with a focus on hidden white-tip sharks and diverse anemones. The turn-around point is dictated by air consumption and no-decompression limits, with the safety stop conducted in the shallow, protected parts of the reef before a boat pick-up.

Underwater photography

The Four Brothers provides exceptional opportunities for both wide-angle and macro photography. For wide-angle shots, capture the dramatic volcanic formations, expansive soft coral carpets, and schools of blue triggerfish. A dome port is recommended to emphasize the scale of the formations. Macro photographers will find a wealth of subjects, including cleaning shrimp, ribbon morays, glassfish within the cracks, and a variety of nudibranchs and pipefish. A macro lens with a diopter can be highly effective. Utilize strobes to bring out the vibrant colors of the corals and reef fish, especially on the deeper walls and inside caves. Maintain excellent buoyancy to avoid disturbing the delicate coral and marine life, particularly in the presence of strong currents.

Combine with nearby dive sites

• Nosy Be Wall

  Nosy Be Wall is a renowned dive site located within the Nosy Be Archipelago, known for its dramatic underwater topography.

• The Whale Shark Alley

  The Whale Shark Alley, located within the Nosy Be Archipelago, is renowned for its consistent opportunities to encounter whale sharks…

• Tsarabanjina Reef

  Tsarabanjina Reef, located in the Mitsio archipelago off Madagascar's northwest coast, is celebrated for its untouched underwater…

• Ankarea

  Bank

• Grand bancs

  Grand Bancs is a notable dive site located in the Nosy Be region of Madagascar, characterized by its extensive coral formations and…

Getting there & logistics

Access to The Four Brothers primarily involves flying into Ivato International Airport (TNR) in Antananarivo, the capital of Madagascar. From there, domestic flights typically connect to Nosy Be, which serves as the main gateway to the Mitsio Archipelago. Liveaboards or resorts on Nosy Tsarabanjina offer direct access, with dive sites usually a short boat ride away. Most dive trips combine this site into multi-day liveaboard itineraries exploring the Mitsio Islands, with durations ranging from several days to a week or more. While specific permits for diving are usually handled by dive operators, visitors should confirm any national park fees or local marine park charges as part of their package.

Safety & environment

The nearest recompression chamber facilities are limited in Madagascar, emphasizing the critical importance of comprehensive dive insurance with emergency evacuation coverage. Divers should maintain strict adherence to no-decompression limits and ascent rates. Site-specific hazards include potentially strong, unpredictable currents, which require careful dive planning, appropriate experience, and vigilant attention to guide instructions. Visibility can occasionally be reduced by plankton blooms, impacting spatial awareness. Always dive with a reliable surface marker buoy (SMB) and ensure all equipment is in excellent condition. Follow guide briefings meticulously, and be aware of boat traffic in surface waters after surfacing.

Who it suits — and who it doesn't

FAQ

The Four Brothers FAQ