Claudio Contreras / Californian sea lion (Zalophus californianus) swimming in Southern sea palm (Eisenia arborea) and Giant Kelp (Macrocystis pyrifera) forest, San Benitos Islands, Baja California Pacific Islands Biosphe...

Jordi Chias / Antarctic fur seal (Arctocephalus gazella), Antarctic Peninsula, Antarctica.

Jordi Chias / Antarctic fur seal (Arctocephalus gazella), Antarctic Peninsula, Antarctica.

Cyril Ruoso / South American fur seal (Arctocephalus australis) coming up to beach from sea, Punta San Juan, Peru

Cyril Ruoso / South American fur seal (Arctocephalus australis) male head profile, Punta San Juan, Peru

Alex Mustard / California sea lion (Zalophus californianus) adult female swimming through sunbeams in an underwater cave. Los Isotes, La Paz, Mexico. Sea of Cortez, East Pacific Ocean.

Alex Mustard / California sea lion (Zalophus californianus) resting in the canopy of a forest of giant kelp (Macrocystis pyrifera). Santa Barbara Island, Channel Islands. Los Angeles, California, United States of Am...

Chris & Monique Fallows / Cape fur seal (Arctocephalus pusillus) porpoising, False Bay, Cape Town, South Africa, July.

Chris & Monique Fallows / Great white shark (Carcharodon carcharias) predating Cape fur seal (Arctocephalus pusillus) Seal Island, False Bay, South Africa, July. Sequence 3 of 3

Alex Mustard / Young California sea lion (Zalophus californianus) playing in the canopy of a forest of Giant kelp (Macrocystis pyrifera). Santa Barbara Island, Channel Islands. California, USA. North East Pacific Oc...

Tony Wu / Juvenile Australian sea lion (Neophoca cinerea) silhouetted against blue skies at Carnac Island, Western Australia

Tony Wu / Juvenile Australian sea lion (Neophoca cinerea) resting in shallows, possibly to thermoregulate, Carnac Island, Western Australia.

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) jumping out of Pacific ocean. Sombrero Chino, Santiago Island, Galapagos.

Gabriel Rojo / Orca (Orcinus orca) with South American sealion (Otaria flavescens) in mouth, beaching itself on shore. Punta Norte, Valdez Peninsula, Argentina. April.

Alex Mustard / California sea lion (Zalophus californianus) bursts through a school of Pacific chub mackerel (Scomber japonicus) while hunting beneath Eureka oil rig, Los Angeles, California, USA, Pacific Ocean

Richard Robinson / New Zealand sea lion (Phocarctos hookeri) breeding colony at Sandy Bay, Enderby Island, Auckland Islands archipelago, New Zealand. January. Editorial use only.

Gabriel Rojo / Underwater cameraman filming South American sea lion (Otaria flavescens) Peninsula Valdes, Patagonia Argentina

Richard Robinson / New Zealand sea lion (Phocarctos hookeri) female in the water at the Sandy Bay colony, Enderby Island, Auckland Islands archipelago, New Zealand. Editorial use only. Editorial use only.

Richard Robinson / New Zealand sea lion (Phocarctos hookeri) female face close up underwater, Sandy Bay colony, Enderby Island, Auckland Islands archipelago, New Zealand. Editorial use only. Editorial use only.

Richard Robinson / New Zealand sea lion (Phocarctos hookeri) female fighting off male in the water, Sandy Bay colony, Enderby Island, Auckland Islands archipelago, New Zealand. Editorial use only. Editorial use only.

Richard Robinson / New Zealand sea lion (Phocarctos hookeri) male chasing down a female to mate, Sandy Bay colony, Enderby Island, Auckland Islands, New Zealand. Editorial use only.

Mary McDonald / Steller sea lion (Eumetopias jubatus) sunning on channel buoy, Petersburg, Alaska, USA, August.

Cyril Ruoso / South American fur seal (Arctocephalus australis) female with young pup on beach, Punta San Juan, Peru

Alex Mustard / California sea lions (Zalophus californianus) group playing in the sun in the early morning. Santa Barbara Island, Channel Islands. Los Angeles, California, United States of America. North East Pacifi...

Chris & Monique Fallows / Cape fur seal (Arctocephalus pusillus), feeding on striped catshark (Poroderma africanum), False Bay, Cape Town, South Africa, July 2014

Chris & Monique Fallows / Cape fur seal (Arctocephalus pusillus) colony with sunrays through clouds, Seal Island, False Bay, South Africa, August 2015

Chris & Monique Fallows / Cape fur seal (Arctocephalus pusillus), Injured by Great white shark, False Bay, Cape Town, South Africa, July 2015

Chris & Monique Fallows / Great white shark (Carcharodon carcharias) leaping out of water to predate seal, Seal Island, False Bay, South Africa, July.

Suzi Eszterhas / California sea lions (Zalophus californianus) two resting with flippers round each other, Monterey Bay, California, USA, September.

Suzi Eszterhas / California sea lion (Zalophus californianus) juvenile amongst adults, Monterey Bay, California, USA, June.

Tony Wu / Two male Australian sea lions (Neophoca cinerea) play fighting with one another, Carnac Island, Western Australia.

Tony Wu / Australian sea (Neophoca cinerea) juvenile playing in the sand, Carnac Island, Western Australia.

Tony Wu / Juvenile Australian sea lion (Neophoca cinerea) approaching with curiosity, with details of whiskers, Carnac Island, Western Australia.

Tony Wu / Australian sea lions (Neophoca cinerea) two males, sitting side by side. Carnac Island, Western Australia. It is the only sea lion colony in the world that comprises only males.

Tony Wu / Australian sea lion (Neophoca cinerea) juvenile in shallow water on sandy seabed, Carnac Island, Western Australia.

Pascal Kobeh / Group of California sea lions (Zalophus californianus) swimming in kelp forest (Macrocystis pyrifera), California, USA. Pacific ocean.

Pascal Kobeh / Group of California sea lions (Zalophus californianus) swimming in kelp forest (Macrocystis pyrifera), California, USA. Pacific ocean.

Pascal Kobeh / Group of California sea lions (Zalophus californianus) in a kelp forest (Macrocystis pyrifera), California, USA. Pacific ocean.

Pascal Kobeh / Young Galapagos sea lion (Zalophus wollebacki) with Green turtle in the background, Ecuador, Galapagos. Pacific ocean.

Pascal Kobeh / Dominant male Galapagos sea lion (Zalophus wollebacki), hunting in a school of Galapagos mullets (Mugil galapagensis), Ecuador, Galapagos. Pacific ocean.

Pascal Kobeh / Galapagos sea lion (Zalophus wollebacki), with Green turtle (Chelonia mydas) returning to sea, Galapagos. Pacific ocean.

Pascal Kobeh / Diver with a playful California sea lion (Zalophus californianus) Baja California peninsula, Mexico. Sea of Cortez. September 2010.

Pascal Kobeh / Photographer diver with a playful California sea lion (Zalophus californianus) Baja California peninsula, Mexico. Sea of Cortez. September 2010.

Pascal Kobeh / Photographer diver with a playful California sea lion (Zalophus californianus) Baja California peninsula, Mexico. Sea of Cortez. September 2010.

Pascal Kobeh / Diver with a playful California sea lion (Zalophus californianus) Baja California peninsula, Mexico. Sea of Cortez. September 2010.

Pascal Kobeh / Diver with a playful California sea lion (Zalophus californianus) Baja California peninsula, Mexico. Sea of Cortez. September 2010.

Pascal Kobeh / Diver with playful California sea lion (Zalophus californianus) Baja California peninsula, Mexico. Sea of Cortez. September 2010.

Pascal Kobeh / California sea lion (Zalophus californianus) swimming in open water, Baja California peninsula, Mexico. Sea of Cortez.

Shane Gross / Galapagos sea lion (Zalophus wollebaeki) hunting shoal of Black striped salemas (Xenocys jessiae), Rabida Island, Galapagos, Ecuador. December.

Shane Gross / Galapagos Sea Lion (Zalophus californianus wollebacki) resting on rocks at sunset on North Seymour Island, Galapagos, Ecuador. December.