Author 'Gipsy34' (Id 172245 ) : The pond of Thau is the most extended and deep in the ponds of the Languedoc (between 4, 5 m and 10 m). It extends from Marseillan a Balaruc on 20 km. The culture of oysters and mussels work of many fishermen (Meze and Bouzigues). Any part of the etang is quadrillee of these tables or to develop these shells. At the bottom the Mont St Clair and Sete.