Stella Maru

Overview

The Stella Maru lies off the north coast of Mauritius, accessible from dive centres based in and around Grand Baie. This decommissioned cargo freighter was deliberately sunk to create an artificial reef, and over the years the ocean has transformed her weathered frame into an extraordinary underwater habitat. Resting on a sandy bottom at approximately 26 metres, with the upper superstructure reaching up to around 19 metres, the wreck sits well within recreational diving limits and is suitable for intermediate divers comfortable with wreck environments.

The Stella Maru's relatively intact hull offers both external reef diving and limited penetration opportunities through open holds and companionways. Her decks slope gently as she lists slightly to one side, creating interesting angles and swim-throughs bathed in filtered tropical light. Visibility in the north of Mauritius is typically excellent, often exceeding 20 metres on calm days, which makes exploring the full length of the wreck a genuinely spectacular experience.

Marine Life

What truly sets the Stella Maru apart is the density and diversity of marine life that has colonised her structure. The wreck serves as a magnet for pelagic and reef species alike, and divers are almost guaranteed multiple impressive sightings on every visit.

• Giant Morays: Large moray eels have taken up permanent residence in the wreck's nooks and crannies. It is common to spot several individuals in a single dive, their heads protruding from porthole openings and rusted gaps in the hull.
• Triggerfish: Titan and yellowmargin triggerfish patrol the reef sections surrounding the wreck. Divers should exercise caution during nesting season, when titans can be territorial, but observing their bold behaviour from a respectful distance is always entertaining.
• Porcupine Fish: These endearing, spiny creatures drift languidly around the wreck structure, often hovering beneath overhangs and in the shelter of the hold openings. Their large, soulful eyes make them a favourite photographic subject.
• Jack Fish: Schools of bigeye trevally and other jack species frequently circle the wreck in tight, silvery formations, catching the light as they move through the water column above the superstructure.
• Additional Species: Lionfish, scorpionfish, snappers, and various wrasse species are regular visitors. The sandy patches around the wreck sometimes reveal garden eels, and the coral growth on the hull supports a rich community of smaller reef fish.

Conditions

The Stella Maru benefits from the generally sheltered conditions of the north coast of Mauritius. The area is protected from the roughest southern swells, and surface conditions are usually calm enough for year-round diving. Currents at the wreck are typically mild to moderate, though they can pick up with tidal changes, and this occasional flow actually benefits divers by bringing in nutrients that feed the healthy marine ecosystem and increasing the chance of pelagic encounters.

Water temperature in the north averages between 24°C in the cooler austral winter months (June to September) and 28–29°C during the warmer summer season (November to March). A 3mm wetsuit is comfortable for most of the year, though some divers opt for a 5mm suit during the cooler months. Visibility is consistently good and can reach 25 metres or more under optimal conditions.

Best Season

The Stella Maru can be dived throughout the year, but the most favourable window runs from October through to May. During this period, water temperatures are warmest and visibility tends to be at its peak. The summer months also bring higher activity levels among reef fish and offer the best chance of larger pelagic visitors. The austral winter (June to September) is cooler and occasionally windier, but the wreck remains diveable and can actually see improved visibility due to reduced runoff.

Diver Tips

• Bring an underwater torch – the interior sections and underside of the hull hide some of the wreck's best marine life, including sleeping porcupine fish and resting morays.
• Allow time to hover above the superstructure mid-water to watch the jack fish schools swirling around you – a highlight not to be rushed.
• Respect the moray eels and never put hands into crevices or holes in the wreck structure.
• This site is ideal for underwater photographers – a wide-angle lens captures the scale of the wreck, while a macro lens reveals the detail of encrusting corals and small critters.
• Book your dive early in the day for the calmest surface conditions and best light penetration into the wreck.