Marais breton

The Marais breton (French pronunciation: [maʁɛ bʁətɔ̃], "Breton Marsh"; or Marais breton-vendéen) is a zone géographique humide (humid geographic zone) along France's Atlantic coast.

It marks the border between two traditional French provinces, Brittany and Poitou, and extends between two French departments, Loire-Atlantique and Vendée, both of which included in the administrative region of Pays de la Loire.

The Marais breton is protected by levees and dunes, stabilized by the pines of the forest of Pays de Monts.

Some areas, such as Bouin are below sea level and were once subject to storm surges.

Per the Natura 2000, the Marais breton is part of a larger geographic cadre which also include the forêt des Pays de Monts, the Bay of Bourgneuf, and the île de Noirmoutier.