Stella Maru Wreck

Overview

The Stella Maru is widely regarded as the finest wreck dive in northern Mauritius, drawing intermediate divers from resorts and liveaboards along the island's pristine north coast. This Japanese freighter was deliberately scuttled in 1987 to create an artificial reef, and over the decades she has settled gracefully onto a sandy bottom at depths ranging from 18 to 25 metres. The wreck lies offshore from the idyllic village of Trou aux Biches, one of the most popular diving hubs on the island, making access straightforward from the many dive centres operating in the area.

The Stella Maru measures roughly 50 metres in length and lies on a slight list, allowing divers to explore her deck, holds, and superstructure with relative ease. The hull is encrusted with soft and hard corals, sponges, and sea fans, giving the entire structure an otherworldly, almost gothic atmosphere. Natural light filtering through portholes and open hatches creates dramatic beams that pierce the interior gloom, rewarding photographers with extraordinary compositions.

Marine Life

The wreck's complexity and the shelter it provides have made it a magnet for a remarkable diversity of Indo-Pacific species. Highlights include:

• Moray eels – Several large morays have taken up permanent residence in the lower sections of the hull, peering from crevices between the encrusted metalwork.
• Grouper – Impressive potato grouper and coral grouper patrol the deck and hold entrances, largely unfazed by divers.
• Lionfish – These flamboyant predators hover in the shadows of the interior, their venomous spines fanned out in warning displays.
• Glassfish and anthias – Dense clouds of glassfish swirl through open sections of the hull, attracting predators and creating mesmerising curtains of silver.
• Octopus – Camouflaged masters of disguise lurk in cavities throughout the wreck, often spotted by sharp-eyed dive guides.
• Barracuda and trevally – Schools of these pelagic hunters frequently cruise above the wreck, hunting the baitfish clouds.

The sandy seabed surrounding the Stella Maru is worth exploring too. Stingrays rest here in the early morning, and nudibranchs decorate the soft corals at the wreck's base, delighting macro enthusiasts.

Dive Conditions

The Stella Maru is an accessible intermediate dive thanks to its moderate depth range of 18 to 25 metres and typically light currents. The site is sheltered enough to be dived year-round, and visibility frequently reaches 15 to 25 metres on calm days. The wreck's maximum depth of 25 metres provides a comfortable no-decompression limit for recreational divers, allowing ample bottom time to explore the exterior and conduct limited penetration of the main holds.

Currents are generally mild at this site, but occasional surges can make penetration dives more challenging. Dive guides always assess conditions before entering the interior. A torch is essential for wreck penetration – the interior can be very dark, and a powerful light will reveal the encrusting life that carpets every surface inside.

Best Season

The Stella Maru can be dived in every month of the year, making it one of Mauritius's most versatile dive sites. The calmest and clearest conditions typically occur from May through November during the austral winter and spring, when trade winds are steady and seas are generally flat. The summer months of December through March can bring tropical cyclone activity to the region, which may temporarily affect sea state and visibility, but surface intervals between weather systems are often perfectly diveable. January through April tends to offer the warmest water temperatures, typically 27–29°C, which reduces the need for a wetsuit beyond a thin 3mm shortie.

Practical Tips

• Bring a primary torch and a backup light for penetration dives – the interior is dark.
• Choose an early morning dive for the calmest conditions and the best natural light effects inside the wreck.
• Intermediate certification is recommended; open water divers should dive the exterior only, accompanied by a guide.
• Buoyancy control is critical when penetrating the holds to avoid stirring up silt and reducing visibility.
• Combine the Stella Maru with a second dive at a nearby reef such as Turtle Bay or the Trou aux Biches reef for a full day underwater.
• Nitrox is available from most local operators and extends bottom time significantly at 25 metres.