A young Grey Seal pup (Halichoerus grypus) on the shore with its mother in winter, at Donna Nook Nature Reserve, on the North Sea coast of Lincolnshire, Great Britain.

grey seal pup mother winter nature reserve north sea lincolnshire animal behavior marine mammals wildlife shore beach resting maternal bond habitat family conservation coastal ecosystem markings natural setting life population dirty water sandy feeding welfare coastline aquatic watching exploration migration biology oceanic creatures interactions observation lifecycle experience