Look carefully and you may see adult seals on the beach, and the young pups with their mothers in the dune area. This fence is a temporary structure preventing humans and dogs from disturbing the seals, but sometimes we do silly things. Only last week a seal pup that looked a bit lost was picked up and wrapped in a coat by a well meaning lady, and taken to one of the wardens. The pup died very shortly afterwards, and should have remained near its mother. I used the zoom built in to the camera to achieve closeups.