La Catis is a reef and drop-off site located off Saint-Malo, France. The topography features a slope descending from 16 metres to a maximum depth of 34 metres. Divers encounter moderate currents, and visibility ranges from 10 to 30 metres. Due to the water temperature fluctuations between 9C and 19C, a 7mm wetsuit is suitable for summer, while a drysuit is recommended for autumn and winter. Access is by boat only. Species recorded around this area include European Common Cuttlefish, wrasses, squat lobsters, catsharks, sea slugs, sea stars, spiny spider crabs, shrimp, rock crabs, common moon jellyfish, brittle stars, abalone, and snails.

The Timac is a wreck dive located 6000 metres off the coast of Saint-Malo, France. Resting at depths between 20 and 25 metres, this site is suited for intermediate divers due to strong currents and potential entanglement risks within the wreck structure. Visibility typically ranges from 5 to 10 metres. Water temperatures fluctuate significantly throughout the year, ranging from 9C in winter to 19C in September. Divers should plan their visit around slack water and use boat charter services for access. Species recorded around this area include European Common Cuttlefish, various crabs, lobsters, and conger eels.

The M4600 is a wreck dive located off the coast of Saint-Malo, France, resting at depths between 20 and 28 metres. This site is accessible by boat and is suitable for beginner divers, though it requires careful planning around tidal windows due to moderate currents. Visibility typically ranges from 5 to 10 metres. Divers should be aware of entanglement risks and overhead environments associated with the wreck structure. Water temperatures fluctuate significantly throughout the year, ranging from 9 to 19 degrees Celsius, making drysuits or thick wetsuits advisable outside of the summer months. Always confirm tidal conditions with your boat operator before descending.

Les Buharats is a reef dive located off the coast of Saint-Malo, France, suitable for beginner divers. The site features a reef structure at depths ranging from 10 to 20 metres. Divers should expect moderate currents and variable visibility between 10 and 30 metres. Access is by boat only to avoid surf and shore break. Water temperatures fluctuate between 9C and 16C throughout the year, requiring appropriate thermal protection. Divers should maintain careful buoyancy to avoid sharp rocks and sea urchins present near the reef structure. Shore facilities including changing rooms, showers, and a rinse station are available for post-dive use.

The Fremur is a wreck dive located off Saint-Malo, France, resting at depths between 20 and 25 metres. This site requires boat access to avoid surf and shore break. Divers should expect moderate currents and visibility ranging from 5 to 10 metres. Due to the entanglement risks present on the structure, a cutting tool is essential. The site is suited for intermediate divers who possess solid buoyancy control. Water temperatures fluctuate between 9 and 15 degrees Celsius, necessitating a drysuit or thick wetsuit. The wreck provides a habitat for various temperate marine life, including reef fish and invertebrates that have colonised the structure.

Located 3500 metres from the coast of Saint-Malo, the South Beach of Île de Cézembre is a reef site accessible only by boat. The area features rocky outcroppings and shallow waters ranging from 2 to 8 metres, with an average depth of 5 metres. This site is suitable for beginners and offers a snorkel rating of 4 out of 5. Divers and snorkellers should be aware of moderate currents and boat traffic in the vicinity. Water temperatures fluctuate between 9C in February and 18C in August and September. Facilities on the island include a cafe and toilets.

Le Fetlar is a reef dive located off the coast of Saint-Malo, France. The site features a seabed ranging from 17 to 28 metres in depth. Divers should expect moderate currents throughout the area, requiring the ability to fin against the flow in short bursts. Visibility at the site typically ranges between 5 and 10 metres. Due to water temperatures fluctuating between 9 and 16 degrees Celsius, a 7mm wetsuit or a drysuit is recommended for comfort. Access to this site is exclusively by boat. It is suitable for divers seeking an introduction to temperate reef environments.

The Ro21 is a wreck site located 5000 metres off the coast of Saint-Malo, France. The structure lies at depths ranging from 1 to 25 metres, with an average depth of 18 metres. Divers experience moderate currents and visibility between 5 and 10 metres. Due to the cool water temperatures of 10 to 15 degrees Celsius, a drysuit or thick wetsuit is necessary. The site presents entanglement risks and overhead environments, requiring caution. Access is by boat only, and guided tours are recommended for beginners. Facilities at the departure point include changing rooms, showers, a rinse station, and air fills.