We meet at our boat, in front of the restaurant "Le Carré Rouge" (Quai Jean Miquel, 34300 Cap d’Agde)
• Catamaran with glass-bottom compartments for underwater observation
• Views of Fort Brescou, an island on a submerged ancient volcano
• Admire volcanic cliffs and Grande-Conque's black sand beach
Discover the underwater world with our glass-bottom catamaran trip from Cap d'Agde! Our journey begins from the bustling port of Cap d'Agde, where you will board a spacious catamaran equipped with four glass-bottom compartments. These unique features allow you to explore the marine life in a truly original way.
Our first highlight is the island of Fort Brescou, built on the submerged part of an ancient volcano. This historical site is perfect for those interested in history and geology. We will then head to the rocky coast of Cap d'Agde, where you can admire the stunning volcanic cliffs and the unique black sand beach of Grande-Conque. The tour continues past the rocks of "Les Deux Frères". The catamaran offers an even more impressive view thanks to its powerful underwater night lighting. Please note that while we strive to provide the best experience, the visibility of the underwater world and fish is not guaranteed.
We meet at our boat, in front of the restaurant "Le Carré Rouge", 30 minutes before departure. If you come by car, you will find free and paid parking nearby.
Name of the boat: Cap Nemo
Catamaran
Number of passengers: 151
Sun-protected area
Wheelchair-accessible toilets (manual wheelchairs only)
Suitable for children of all ages, pregnant women and the elderly
Sunscreen, sunglasses and hat
Windbreaker
Accessible to strollers
Not accessible to manual wheelchairs
You are allowed to bring your own drinks and snacks
If bad weather forces the provider to cancel the activity, you’ll receive a full refund or have the option to reschedule
Dogs allowed if kept on a leash
Viewing of the seabed and fish is not guaranteed 100%; n the event of unforeseen weather changes resulting in poor visibility, no refunds will be issued
This one-hour glass-bottom boat tour is highly praised by visitors, with about 75% of reviewers giving it a five-star rating. It's particularly popular with families, who find the duration perfect for children. Reviewers consistently celebrate the "impeccable organization, stunning scenery," and the friendly, professional crew. The main highlight is the underwater viewing window for observing fish. While most find the experience fantastic, a few guests wished for more than one viewing stop and noted that commentary is sometimes only in French. Overall, it's considered a wonderful, great-value experience perfect for a family outing.
AI generated from the text of customer reviews
Great family outing... very pleasant and the underwater view is magnificent.
Very friendly team! Top-notch boat trip with underwater viewing; it was impressive to see the schools of fish!
Great! Suitable for the whole family!
Yes, dogs are allowed on board as long as they are kept on a leash.
Yes, you are allowed to bring your own drinks and snacks.
The trip offers views of Fort Brescou island, the volcanic cliffs, the Grande-Conque black sand beach, and the "Les Deux Frères" rocks. You can also observe the underwater world through the boat's glass-bottom compartments.
Viewing the seabed and fish is not guaranteed. In the event of unforeseen weather changes resulting in poor visibility, no refunds will be issued.
Please meet at the boat, named "Cap Nemo", in front of the "Le Carré Rouge" restaurant 30 minutes before departure.
Yes, the trip is suitable for children of all ages and the boat is accessible to strollers.
The boat is not accessible to manual wheelchairs. However, there are wheelchair-accessible toilets on board.
It is recommended to bring sunscreen, sunglasses, a hat, and a windbreaker.
The boat trip lasts approximately one hour.
Yes, there is a guide on board who provides commentary during the trip. Please note that the commentary is in French only.






The activity Catamaran Trip from Cap d'Agde with Underwater Observation by Les Bateaux Agathois is available every day, from August 29, 2026 through November 2, 2026. Each day offers 3 start times between 11:00 and 17:45. Sessions last 1 hour and are offered as group activities. Prices start from €10.00 for kids and €13.00 for adults.





