The scheme to win back and protect the ecosystems, coupled with the objective of a coherent management policy of the water in the river basins which sustain the bay and which neccessitates a collective  effort,  implies the participation of numberous public bodies.

Loire-Bretagne Water Agency
Seine-Normandie Water Agency
CSP (Conseil Supérieur de la Pêche, Fishing Authorities)
Northern Normandy Regional Shellfish Farming Section
Museum of Natural History
University of Caen
University of  Rennes
IFREMER (Institut Française de Recherche pour l'Exploitation de la Mer, French Institute for Research into the exploitation of the sea)
County Council of the Manche department
County Council of the Ille et Vilaine department
County Council of the Mayenne department
Regional Council of Brittany
Regional Council of Lower Normandy
Federation for fishing and the protection of the natural environment in the Morbihan
De-silting mission for the Mont Saint Michel
MISE 35, MISE 50, MISE 53 (Mission Interservices de l'Eau, Inter-service water mission)
DDASS 35, DDASS 50, DDASS 53 (Departmental Sanitary and Social Affairs Services)