HYDROSPHERE is a technical diving school and exploration centre based in Arcachon, France, specializing in wreck dives along the Atlantic coast. Its outings access sites from Lacanau to Mimizan, as well as wrecks near the Cordouan lighthouse, with dives ranging from 30 to 80 metres. Depending on the site and depth, divers may use Nitrox, normoxic Trimix or rebreathers. The centre describes the region’s clear water and diverse marine life, which includes lobsters, blue sharks, sunfish, sea bass and conger eels.

HYDROSPHERE provides recreational and technical training through TDI-SDI and FSGT pathways, with instruction tailored to individual progress and certifications aligned with international standards. Courses cover air, Nitrox and Trimix, open-circuit diving in DIR or sidemount configurations, and closed-circuit rebreathers. The centre also offers a calendar of training courses and dive trips, equipment sales, rental, and cylinder filling. Its equipment range is selected and tested for the demanding conditions of the Bay of Biscay, and the business provides after-sales support. HYDROSPHERE also promotes voyages and expeditions.