Alex Hyde / Southern Elephant Seal bull (Mirounga leonina) close up portrait, King Haakon Bay, South Georgia. November.

Ingo Arndt / Antarctic Fur Seal (Arctocephalus gazella) bull on land, Stromness Bay, South Georgia Island, Southern Ocean, Antarctic Convergence, November 2008

Wim van den Heever / South African fur seal (Arctocephalus pusillus pusillus) bull breaking apart octopus. False Bay, Cape Town, South Africa.

Sean Crane / Northern Elephant Seal (Mirounga angustirostris) male calling in territoral display with breath visible, San Simeon, California

Floris van Breugel / Two Bull Northern Elephant Seals (Mirounga angustirostris) face off before fighting in the middle of the extensive Piedras Blancas rookery with over 150 seals just in this photo, mostly pregnant or nu...

Tui De Roy / Galapagos fur seal (Arctocephalus galapagoensis) large territorial bull on volcanic rocks. South Coast Cerro Azul (Cinco Cerros), Isabela, Galapagos Islands, Ecuador, June.

David Woodfall / Bull Grey Seal (Halichoerus grypus) asleep in pool with reflection of bombing range sign in pool. Donna Nook, UK, November.

David Woodfall / Bull Grey Seal (Halichoerus grypus) asleep in pool with reflection of bombing range sign in pool. Donna Nook, UK, November.

Peter Cairns / 2020VISION / Grey seal (Halichoerus grypus) on haul out in fishing harbour with ferry in the background, Shetland Isles, Scotland, UK, June 2010

Peter Cairns / 2020VISION / Grey seal (Halichoerus grypus) bull with reflections on water of harbour lights, Shetland Isles, Scotland, UK, June 2010. Photographer quote: 'This 'seal on fire' is actually bobbing in a harbour and...

Pete Oxford / Southern Giant Petrels (Macronectes giganteus) feeding on the carcass of a Southern Elephant seal bull, killed by Killer whales. Sea Lion Island. South of mainland east Falkland Island. Falkland Islan...

Piper Mackay / Two bull Northern elephant seals (Mirounga langustirostris) fighting in the waves, Pt Piedras Blancas, California, USA