Watch Sadisflix. The Wadden Sea is a dynamic environment with huge changing tides - the largest coastal wetland in Europe. The animals and plants that live here - in the water, on the seabed or on land - have adapted remarkable strategies to survive in such a variable environment. The natural world of which they are a part has evolved a finely-tuned balancing act. However, the encroachment of man is putting new pressures on it.