The Wadden Sea is a unique wildlife area. It is also referred to as a "delivery room" for many animals. Pollution poses a direct threat to seals. Many poisonous substances find their way into the Wadden Sea through illegal dumping and the activities of the shipping industry. This happens directly in the Wadden Sea, but also in the connected rivers and in the North Sea. The toxins are present in the Wadden Sea, for instance, as sediment in the mud on the bottom of the sea. Eventually it will reach the food chain.

Our scientific research has shown that the Wadden Sea seal"s immune system is affected by pollution. Seals have become more susceptible to infectious diseases such as viruses, bacteria and parasites.