English: This image, acquired on 6 March 2021 by one of the two Copernicus Sentinel-2 satellites, shows the Somme Bay in France. Somme Bay (Baie de Somme) is a large estuary in the Picardy region of France, protected as a RAMSAR site and a Natura 2000 site under the Habitats Directive due to the exceptionally rich ecosystems it hosts. Six rivers, including the Somme river, drain via the Somme Bay into the English Channel, interweaving mudflats, stony beaches, sand dunes and wet meadows that stretch over a surface area of more than 100 km². The Somme Bay is one of the most important European ornithological sites, host to more than 350 species of birds and numerous other fauna and flora habitats, including France’s largest colony of seals. This coastal zone is particularly vulnerable to climate change. Numerous coastal protection activities have been implemented in the area to prevent the degradation of its ecosystems due to coastal erosion, which has a particularly strong impact along the English Channel. The European Marine Strategy Framework Directive is a legislation framework for community action in the field of marine environmental policy. To support these efforts, the Copernicus Land Monitoring Service has recently released the Coastal Zones datasets, a new product that has been developed to monitor the complex dynamics of coastal environments and to support actions to mitigate the effects of climate change and, in particular, sea level rise.