Golfe du Morbihan

The Gulf of Morbihan is a small inland sea in southern Brittany. Its name comes from the Breton "mor bihan", "little sea". It covers about 115 km², with a coastline of 240 km, and communicates with the Atlantic only through the Port-Navalo channel, about 900 metres wide. This narrow passage causes powerful tidal currents, the Jument current reaching more than 9 knots.

There are about fifty islands, of which only the Île-aux-Moines and the Île d'Arz form communes. Megalithic heritage is dense: the cairn of Gavrinis is about 60 metres wide, and the cromlech of Er Lannic, partly submerged, bears witness to the rise in sea level since prehistory.

Oyster farming marks the shores of the gulf, which mainly produces juvenile oysters. The Gulf of Morbihan Regional Nature Park, created in October 2014, covers 92,000 hectares across 38 communes. Vannes, at the far north, is a classic starting point for boat trips, which are mostly taken from late spring to early autumn.

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