Trou d'Eau is a shallow reef lagoon located within the Saint-Gilles Marine Reserve. Reaching depths of up to two metres, this site is accessible directly from the shore and is well-suited for beginners. The lagoon features well-preserved coral structures, including healthy branching coral colonies. Conditions are generally calm with mild currents, making it a suitable environment for snorkelling. Water temperatures range from 24C in the cooler months to 28C during the warmer season. As a protected marine area, the site offers a accessible look at the local reef topography and its associated habitats.

Lagon de la Saline is a shallow reef site located within the Saint-Gilles Marine Reserve. Situated off La Saline Beach, the area features depths reaching a maximum of two metres. The site is accessible directly from the shore and is well-suited for beginners due to the mild currents. While the lagoon provides a calm environment for snorkelling, the coral structures in this specific area are largely degraded. Water temperatures at this location range between 24C and 28C throughout the year, depending on the month.

Lagon de l'Ermitage is a shallow reef and seagrass site located within the Saint-Gilles Marine Reserve. Protected from the open ocean swell by a coral reef, the site features depths ranging from 1 to 2 metres. It is accessible via a shore entry and is suitable for beginners, with mild currents and visibility typically between 10 and 25 metres. Water temperatures fluctuate between 24C and 28C throughout the year. Facilities available at the site include parking, toilets, showers, and a cafe. Potential hazards include jellyfish, lionfish, rip currents, sharks, sharp coral, and stonefish.

The Antonio Lorenzo is a 50-metre long longliner wreck resting on its port side in the Saint-Gilles Marine Reserve. Located on a flat, featureless seabed at depths between 32 and 40 metres, with an average depth of 38 metres, this site functions as an artificial reef. Access is by boat only. Due to the depth and potential for entanglement within the structure, this site is suitable for advanced divers. Conditions include moderate currents and visibility ranging from 10 to 30 metres. Species recorded around this area include wrasses, rock cod, Moorish idols, boxfish, triggerfish, moray eels, lionfish, and octopuses.

Aquabulle, located in the Saint-Gilles Marine Reserve, features a combination of natural reef and artificial structures. The site is suitable for beginners, with depths ranging from 2 to 25 metres. Divers access the area by boat. While currents are generally mild, they can be strong, requiring divers to monitor their depth and stay close to the boat. Visibility varies significantly, reaching up to 50 metres in optimal conditions. Water temperatures remain between 24 and 28 degrees Celsius throughout the year. Night diving is available at this location, and local facilities include parking, a dive shop, and boat charter services.

La grotte à Nono is a boat-access cave and reef site located in the Saint-Gilles Marine Reserve. The dive sits at depths between 30 and 40 metres, with an average depth of 35 metres. Visibility typically ranges from 10 to 30 metres. As an overhead environment, the site requires precise buoyancy control to avoid contact with sharp coral and rock structures. While currents are generally mild, they can become strong, necessitating careful planning and consultation with local operators. This site is suitable for intermediate divers and is accessible for night dives. Facilities including equipment rental, air fills, and boat charters are available nearby in Saint-Gilles-les-Bains.

Sec a zitte is a reef and artificial reef site located in the Saint-Gilles Marine Reserve. The topography consists of two rocky and coral domes that rise from a depth of 40 metres to a shallow point of 14 metres. A notable feature is an anchor resting at a depth of 22 metres. This site is sheltered from the swell, making it a relatively easy dive suitable for beginners. Divers access the site by boat. Visibility is high, typically ranging between 30 and 40 metres, with water temperatures between 24 and 28 degrees Celsius. Night diving is available at this location.

Pierre Aux Platax is a reef dive site located at Cap La Houssaye, Reunion. The site is accessed by boat and is suitable for beginner divers. The topography features a reef environment with depths ranging from 8 to 20 metres, averaging 14 metres. Water temperatures fluctuate throughout the year, ranging from 24C to 28C. Divers should be aware of the presence of stonefish in the area. As a marine reef site, it offers a typical underwater environment for the region.