La Plagette is a sheltered cove on the Vermilion Coast featuring a 200-metre underwater trail. The site is characterised by volcanic basalt formations that provide a dark backdrop for the local marine life. Divers and snorkellers can explore a mix of reef, artificial reef, and seagrass habitats at depths ranging from 1 to 5 metres, with an average of 3 metres. Common sightings include tompot blennies, scorpionfish, wrasses, and common octopus, alongside various nudibranchs and soft corals. The site is accessible from the shore and is suitable for beginners, with mild currents and typical dive durations of 45 minutes. Facilities include parking, toilets, showers, and equipment rental.

La Plagette, situated at the foot of the Cap d’Agde volcanic cliffs, is a reef and artificial reef site on the Vermilion Coast. This shore-entry location is suitable for beginners, with depths ranging from 0 to 5 metres and an average depth of 3 metres. A snorkel trail featuring five educational buoys has been established here since 2007. Conditions vary, with visibility between 2 and 15 metres and mild currents. Hazards include jellyfish, sea urchins, sharp coral, strong currents, and surf. Facilities available at the site include parking, toilets, showers, a cafe, and first aid services. Guided tours are also provided for visitors.

Les 3 Pics is a reef dive located on the Vermilion Coast, France, accessible only by boat. The site features a rocky structure ranging from 10 to 23 metres in depth, subject to mild currents. Divers should monitor their depth closely and remain vigilant for local boat traffic during ascents. Visibility at this site is variable, which can influence the ability to survey the reef structure effectively. Water temperatures fluctuate between 12C and 19C throughout the year. Species recorded around this area include wrasses, scorpionfish, common octopus, and various sea slugs, alongside occasional sightings of conger eels and slipper lobsters.

Brescou is a dive site located on the Vermilion Coast, France, defined by its unique volcanic base and historical context. The site features rocky depths of volcanic origin alongside coralligenous formations created by calcareous algae. Diving here reaches depths of up to 10 metres, making it suitable for beginners. Access to the site is by boat, and divers should remain aware of boat traffic in the area. Conditions are generally mild, with water temperatures ranging from 12C in February to 22C during the summer months of July and August.

Sentier Sous Marin is a marked underwater snorkel trail located along a shallow reef on the Vermilion Coast. Accessible directly from the shore, the site reaches a maximum depth of 10 metres with an average depth of 4 metres. The area features a mild current, making it suitable for beginners. Water temperatures fluctuate between 12C and 23C throughout the year, so a wetsuit is recommended outside of the summer months. On-site facilities include changing rooms, a rinse station, and equipment rental. Divers and snorkellers should wear protective footwear and exercise caution to avoid sharp coral and rocks when entering the water and navigating the reef.

Plage Du Lazaret on the Vermilion Coast is a shallow site featuring a mix of reef, seagrass, and artificial reef structures. With an average depth of 2 metres, it is accessible via shore entry and suits beginners. Divers and snorkellers may encounter common species such as bream and various crabs, alongside less frequent sightings of common octopus, European common cuttlefish, wrasses, scorpionfish, and flatworms. Visibility ranges from 3 to 15 metres, and water temperatures fluctuate between 12C and 23C throughout the year. The site is equipped with parking, toilets, showers, first aid, and a cafe. Note that hazards include sharp coral and surf conditions.

Crique de la Vigie at L'Anau is a small, wild cove situated at the base of the cliffs in Sète. The site features a rugged underwater landscape defined by numerous crevices and small caves. These geological formations provide shelter and nursery areas for local Mediterranean marine life. Access to the water is via the shore. With a snorkel rating of 3 out of 5, this location is best suited for intermediate snorkellers. Water temperatures fluctuate throughout the year, ranging from 12C in February to 23C during the peak summer months of July and August.

Ponton de la Bordelaise is a shallow saltwater lagoon site on the Vermilion Coast, offering a unique muck-style snorkeling experience. The site features an artificial reef structure near an old lighthouse, with depths ranging from 1 to 6 metres and an average depth of 5 metres. It is well-suited for beginners, with shore access and mild currents. Visibility at the site varies between 2 and 10 metres. Water temperatures fluctuate seasonally, ranging from 12C in February to 23C in July and August. Snorkellers should remain aware of boat traffic in the area and the presence of jellyfish.