Grande Anse Rocky Pool is a shallow, sheltered area located south of the main beach in the Saint-Gilles Marine Reserve. This site features a mix of natural reef and artificial structures, providing a safe environment for beginners to snorkel or dive. With an average depth of one metre, the pool is protected from the open ocean swell. Divers and snorkellers can observe a variety of marine life, including wrasses, Bluespine Unicornfish, Raccoon Butterflyfish, Moorish Idols, and Elongate Clams. Other species present include hawkfish, crabs, and various goatfish. Be aware that sharp coral is present within the pool. Access is via the shore, with parking available nearby.

Lagon De Saint-Pierre is a shallow reef lagoon located within the Saint-Gilles Marine Reserve. The site is sheltered from open ocean turbulence, making it suitable for beginners. Divers and snorkellers can expect depths averaging 1 metre, with a maximum of 2 metres. Access is via the shore, and conditions typically feature mild currents. The site offers facilities including parking, toilets, and showers. Night diving is permitted at this location. Due to the nature of the reef environment, visitors should be aware of hazards including sharp coral and sea urchins. The site is well-regarded for both diving and snorkelling activities.

Saint-Pierre Wall is a marine wall dive located off Saint-Pierre, Reunion. The site features a vertical drop-off starting at 15 metres and extending to 40 metres. Divers experience visibility ranging from 15 to 30 metres. Water temperatures remain between 24 and 28 degrees Celsius throughout the year. This site is strictly boat access, as strong currents and surf conditions make shore entry impractical. Due to the significant depths and potential for strong currents, this site is suited for intermediate divers with solid buoyancy control. Divers should monitor their depth closely and coordinate drift plans with their boat operator before entry.

Etang Salé is a distinctive semi-lagoon site within the Saint-Gilles Marine Reserve, characterised by its black sand seabed and coral formations. The site features a coral barrier that provides partial protection, making it suitable for beginners. Snorkelling depths range from 2 to 6 metres, with visibility typically between 3 and 10 metres. Access is via the shore. Divers and snorkellers should be aware of potential hazards, including rip currents, strong currents, surf, and sea urchins. Facilities available at the site include parking, toilets, showers, a rinse station, and a dive shop offering air fills.

L'Arche de Noel is a technical dive site located within the Saint-Gilles Marine Reserve. The topography features a rocky wall and a distinct arch measuring approximately seven metres in diameter at a depth of 40 metres. Divers can navigate a tunnel located to the west at 37 metres before ascending along the relief of peaks and plateaus to 25 metres. Due to the depth and moderate currents, this site is reserved for advanced divers. Species recorded around this area include various wrasses, butterflyfish, triggerfish, and moray eels. Boat access is required, and divers should remain vigilant regarding boat traffic and depth management.

Le Sec Jaune is a reef and wall site located within the Saint-Gilles Marine Reserve. The topography features a coral plateau that transitions into a wall, reaching depths between 10 and 20 metres. Access to this site is by boat only. Divers should be aware of potential currents and boat traffic in the area. With visibility ranging from 10 to 30 metres and water temperatures between 24C and 28C, the site is suitable for beginner divers. The underwater environment is characterised by its coral structures and varied reef topography.

Maison verte is a reef and drift dive site located within the Saint-Gilles Marine Reserve. The topography consists of a coral plain featuring a gentle slope that extends between 5 and 25 metres, with an average depth of 18 metres. The seabed is characterised by coral formations including spherical, table, and shrub-like structures. Access to this site is by boat, situated 2500 metres from the shore. Divers can expect mild currents and visibility ranging from 10 to 30 metres. With water temperatures between 24 and 28C, this site is suitable for beginners and typically offers 50-minute dives.

Bosy's canyon is a reef and drift dive site located within the Saint-Gilles Marine Reserve. The topography features a coral plateau that leads to a small drop-off, with depths ranging from 5 to 20 metres. Access to this site is by boat only. Divers can expect mild currents and visibility typically between 9 and 10 metres. The site is suitable for beginners and offers a typical dive duration of 45 minutes. Water temperatures fluctuate between 24C and 28C throughout the year. Facilities available nearby include parking, air fills, equipment rental, and guided tours. Be aware of sharp coral and the potential for strong currents during your dive.