The Dolfinarium has two kinds of seal. The common seal and the grey seal. Everyone knows the common seal. They can often be seen in the Wadden area. You can also find them in the North Atlantic Ocean, the Baltic and the Irish Sea. Grey seals are considerably larger than common seals and have a conical head. They occur in the Wadden Sea as well. But they also live in colder areas around Norway, the British Isles and Iceland.