Antarctic fur seal (Arctocephalus gazella) pups at the abandoned whaling station at Grytviken on the island of South Georgia, southern Atlantic Ocean.

Antarctic fur seal (Arctocephalus gazella) pups at the abandoned whaling station at Grytviken on the island of South Georgia, southern Atlantic Ocean.

Antarctic fur seal (Arctocephalus gazella) pups mock-fighting at the abandoned whaling station at Grytviken on the island of South Georgia, southern Atlantic Ocean.

Antarctic fur seal (Arctocephalus gazella) pups at the abandoned whaling station at Stromness on the island of South Georgia, southern Atlantic Ocean.

Antarctic fur seal (Arctocephalus gazella) pups in front of the National Geographic Endeavour at the abandoned whaling station at Stromness on the island of South Georgia, southern Atlantic Ocean.

Antarctic fur seal (Arctocephalus gazella) pup playing in the surf at Fortuna Bay on the island of South Georgia, southern Atlantic Ocean. Pictured here is a rare blonde, or leucistic (lack of melanin), pup as compared to the normally dark coloured pup.

Antarctic Fur Seal (Arctocephalus gazella) pups playing at Stromness Whaling Station on the island of South Georgia, Southern Atlantic Ocean.

Sub-Antarctic fur seal (Arctocephalus tropicalis) on Nightingale Island in the Tristan da Cunha Island Group in the southern Atlantic Ocean. Note the lighter face and pelage than that of the Antarctic fur seal.

Antarctic Fur Seal (Arctocephalus gazella) pup on the island of South Georgia, Southern Atlantic Ocean.