Grey seal Molly swims in the partly frozen waters of the North Sea after be...

Grey seal Karlsson looks at the frozen shore of the North Sea after being r...

Grey seal Karlsson looks at the frozen shore of the North Sea after being r...

Two grey seals swim in the partly frozen waters of the North Sea after bein...

Tanja Rosenberger, head of the Friedrichskoog seal sanctuary, looks after t...

Grey seal Molly looks out of a transport crate at the North Sea during her ...

Grey seal Smilla sits on the frozen shore of the North Sea after being rele...

The grey seal Karlsson sits on the frozen shore of the North Sea after bein...

Grey seal Smilla swims through the partly frozen waters of the North Sea af...

The gray seal Molly is brought to the shore of the North Sea in a transport...