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.

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.

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.

Pointe au Sel is a prominent underwater cliff located within the Saint-Gilles Marine Reserve. This site features a significant drop-off that descends from 25 metres to 71 metres, offering a challenging wall dive for advanced divers. Access is strictly by boat due to the nature of the site and the presence of strong currents. Divers should be prepared for variable visibility ranging from 10 to 30 metres and potential surf conditions. Water temperatures remain consistent between 24C and 26C throughout the year. Given the depth, current, and potential for sharks, this site is reserved for experienced divers capable of managing demanding marine environments.

Le Cimetiere is a reef site located 1000 metres offshore within the Saint-Gilles Marine Reserve. The site features a reef structure at depths between 10 and 12 metres, with an average depth of 11 metres. Divers typically experience mild currents and visibility ranging from 10 to 30 metres. Access is by boat only. Due to active boat traffic in the area, divers should remain close to their guide and use a surface marker buoy. The reef contains sharp coral and rock formations, requiring careful buoyancy control. Water temperatures remain between 24 and 28 degrees Celsius throughout the year.

Le Banc Doré is a coral plateau located within the Saint-Gilles Marine Reserve. The site features a gentle slope ranging from 5m to 20m, interspersed with small sandy corridors. Accessible only by boat, this reef offers mild currents, making it a suitable location for beginner divers, technical training, or those looking to refresh their skills. The topography consists of a varied coral structure across the plateau. Water temperatures at this site remain between 24C and 28C throughout the year.

Le Nez du Pharaon is a wall and reef site located within the Saint-Gilles Marine Reserve. Divers typically descend to a plateau at 25 metres before exploring a vertical drop-off that extends to a rocky platform at 60 metres. Due to the significant depth and vertical topography, this site is suited for advanced divers. Access is by boat only, and the site is subject to moderate currents. Visibility ranges from 10 to 40 metres, with water temperatures between 24C and 27C. Night diving is available at this location. Divers should be aware of the deep environment and potential overhead hazards during their 45-minute dives.