Investors in France are being encouraged to put their money into land-based aquaculture projects planned for the suburbs of the country’s big cities.

Prospective land-based projects using recirculating aquaculture systems (RAS) powered by recycled energy from industrial plants in the suburbs of Paris, Marseille, Lyon and Nantes are seen as a way around the shortage of sea-based aquaculture sites on France's coastline.

Many potential offshore farming areas are already reserved for tourism activities, nuclear power plants and military bases. Opposition from owners of coastal properties concerned that aquaculture sites will drag down property values is also a hurdle for development.