Gavrinis is a boat-access rocky dive in the Gulf of Morbihan with a gentle slope, an irregular drop-off, and a seabed that feels more like a current-shaped rock garden than a coral reef. The site is a good match for divers who like reading terrain, staying relaxed in moving water, and finding small life on a low-pressure dive rather than chasing big depth. It is the kind of place where a steady pace and tide awareness matter more than speed.