Wadden Sea
The Wadden Sea is the world's largest continuous intertidal sand and mud flat system. The area encompasses the Dutch Wadden Sea Conservation Area, the German Wadden Sea National Park in Lower Saxony and Schleswig-Holstein, and most of the Danish Wadden Sea Marine Protected Area. It is a vast, mild-climatic, relatively flat coastal wetland environment formed by an intricate interaction of physical and biological factors that have resulted in numerous transitional habitats including tidal channels, sandy beaches, seagrass meadows, mussel beds, sandbanks, mud flats, salt marshes, estuaries, beaches and dunes. The area is home to a wide range of plant and animal species, including marine mammals such as seals, grey seals and harbour porpoises. The Wadden Sea is one of the last remaining large intertidal ecosystems where natural processes continue to operate largely undisturbed.