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 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.

Passe de Trois Bassins is a reef drift dive located within the Saint-Gilles Marine Reserve. The topography features coral drop-offs, sandy areas, and numerous crevices. Divers typically explore depths between 5 and 30 metres, with an average depth of 20 metres. The site is accessible by both shore and boat, situated 1000 metres from the coast. Conditions are generally mild with visibility ranging from 15 to 30 metres. The site is suitable for beginners and supports night diving. Facilities available at the location include showers, toilets, and changing rooms. Divers should be aware of potential hazards including sharks and sharp coral.

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.

Canyons at Cap La Houssaye is a reef and drop-off site accessed by boat. The topography features underwater canyons, with depths ranging from 6 to 27 metres and an average depth of 17 metres. Divers should be aware of moderate currents and the presence of sharp coral and overhead environments. Visibility typically fluctuates between 10 and 30 metres. This site is suitable for beginners and supports night diving, with typical dive durations of 45 minutes. Guided tours, air fills, and equipment rental are available through local dive shops.

Gloria Maris is a shallow reef site located off Cap La Houssaye near Saint-Gilles-les-Bains. The site is suited to newly certified divers and those building confidence, offering calm and protected conditions. Water temperatures range from 24C to 28C throughout the year. Visibility can be variable, so morning dives are recommended to avoid wind chop. Divers should be aware of potential entanglement hazards within the wreck structure and watch for jellyfish in the water column when entering from the boat. Access is primarily from the shore, though local conditions regarding current access points and potential closures should be verified before planning a dive.

Plage Des Roches Noires is a shore-access snorkeling site located at Cap La Houssaye in Reunion. The site features a combination of reef and artificial reef structures, with depths ranging from 1 to 3 metres and an average of 2 metres. Visibility typically reaches 9 to 10 metres. Due to the open ocean exposure, snorkeling is restricted to periods of low swell and must be conducted within the designated shark net area. The site is suitable for beginners, though users should be aware of hazards including surf, strong currents, sharp coral, and sea urchins. Facilities available at the beach include parking, showers, changing rooms, and a cafe.

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.