Brannech Island (NW Side) offers a diverse underwater environment in the Morbihan Islands, featuring a prominent wall, seagrass meadows, kelp forests, and reef structures. Divers can explore depths reaching 30 metres, though conditions vary with visibility ranging from 5 to 15 metres and mild currents. The site is accessible only by boat and is best suited for intermediate divers due to potential surge. Species recorded around this area include European common cuttlefish, orange-clubbed nudibranchs, conger eels, wrasses, tompot blennies, sea stars, cod, soft corals, crabs, snails, sea squirts, and European green crabs. Typical dives last approximately 45 minutes, and the site is also suitable for snorkelling.

Brannech is a varied dive site located in the Morbihan Islands, featuring a diverse underwater landscape of reef, kelp forest, wall, and seagrass. Divers can explore depths ranging from 18 to 30 metres. Visibility at the site fluctuates between 5 and 15 metres, and water temperatures remain between 10 and 16 degrees Celsius, necessitating a drysuit or thick wetsuit. While currents are typically mild, the shore entry is subject to surge and swell, requiring careful timing and observation of local conditions. This site is suited for intermediate divers, and self-sufficiency is recommended as facilities are not guaranteed.

Kerners is a shallow reef located in the Morbihan gulf, offering depths between 8 and 10 metres. This site is accessible by both shore and boat, making it a practical choice for beginners. Visibility typically ranges from 5 to 10 metres, and water temperatures fluctuate between 10 and 18 degrees Celsius throughout the year. Divers should be prepared for moderate to strong currents and significant boat traffic; the use of a surface marker buoy is essential. Species recorded around this area include European common cuttlefish, orange-clubbed nudibranch, conger eel, wrasses, tompot blenny, various crabs, soft coral, common sea stars, cod, snails, and sea squirts.

Cale de Kerners in the Morbihan Islands offers an accessible shore entry via a slipway in Arzon. This site features a mix of rocky reefs and seagrass beds, providing a varied underwater landscape for snorkelers. Depths range from 2 to 8 metres, with an average of 5 metres, making it suitable for beginners. Conditions are generally mild, though currents can vary. The area is frequently used for local training and night snorkeling. Parking and a cafe are available nearby for visitor convenience. Water temperatures fluctuate between 10C and 18C throughout the year.

Les Gorets is a reef and wall site located in the Morbihan Islands. The topography features a dramatic wall structure adorned with orange gorgonians and sponges. Divers and snorkellers can expect depths ranging from 6 to 25 metres. Access to the site is by boat only, and it is best explored at high tide to manage the moderate currents and variable visibility, which fluctuates between 3 and 15 metres. Due to the potential for strong currents and low visibility, this site is suited for intermediate divers. Water temperatures remain cool throughout the year, ranging from 10C to 15C. Boat charters and guided tours are available for those visiting the Morbihan gulf area.

Plage de Brouel on the southern coast of Île d'Arz offers a shallow reef environment suitable for beginners. The site features rocky outcrops at both ends of the beach, providing a habitat for various Atlantic marine life. Snorkellers can explore depths ranging from 1 to 5 metres, with an average depth of 3 metres. Entry is directly from the shore, and conditions are generally mild with visibility fluctuating between 1 and 15 metres. Species recorded around this area include wrasses, sea stars, crabs, and various nudibranchs. Facilities at the location include parking and guided tours, making it an accessible spot for those visiting the Morbihan Islands.

H2jo is a reef site located off the coast of Houat and Hoëdic, France, offering depths ranging from 12 to 40 metres. This boat-access site is characterised by moderate currents that can intensify, requiring careful attention to drift diving conditions. Visibility is variable, and water temperatures fluctuate between 9 and 15 degrees Celsius, necessitating the use of a drysuit or a 7mm wetsuit for thermal protection. Due to the presence of strong currents, divers must coordinate ascents and surface signals with the boat crew. The site is suitable for both Open Water and Advanced certified divers, though deeper sections are intended for those with advanced experience.

La Jument is a boat-accessible dive site located near Houat and Hoëdic in the Morbihan gulf. The site features a reef profile reaching depths of 27 to 29 metres. Divers should be prepared for strong currents, which necessitate careful planning and the use of a surface marker buoy for safe boat pick-up. Visibility typically ranges between 5 and 10 metres. Due to water temperatures fluctuating between 10 and 14 degrees Celsius, a drysuit or thick wetsuit is required. Species recorded around this area include wrasses, conger eels, various crabs, and soft corals. Divers are advised to plan their descent around slack water to manage the current effectively.