Nick Hawkins / Steller's sea lions (Eumetopias jubatus) off the coast of the Great Bear Rainforest, near Bella Bella, British Columbia, Canada. August

Michael Quinton / Steller's Sea Lion (Eumetopias jubatus) with Pink Salmon (Oncorhynchus gorbuscha) prey, Alaska

Eric Baccega / Male Steller sea lion (Eumetopias jubatus) with a group of females hauled out at a rookery, Prince Rupert, British Columbia, Canada, June.

Doug Perrine / Young Steller's / Steller / Northern Sealions (Eumetopias jubatus) curiously approaching the photographer. Glacier Island, Columbia Bay, Alaska, USA, July.

Doug Perrine / Young Steller's / Steller / Northern Sealions (Eumetopias jubatus) curiously approaching the photographer. Glacier Island, Columbia Bay, Alaska, USA, July.

Michio Hoshino / Steller's Sea Lion (Eumetopias jubatus) male calling, Alaska

Nick Hawkins / Steller's sea lions (Eumetopias jubatus) off the coast of the Great Bear Rainforest, near Bella Bella, British Columbia, Canada. August

Nick Hawkins / Steller's sea lion (Eumetopias jubatus) off the coast of the Great Bear Rainforest, near Bella Bella, British Columbia, Canada. August

Mark Carwardine / Steller's sea lions (Eumetopias jubatus) Salish Sea, Vancouver Island, British Columbia, Canada

Alex Mustard / A young Galapagos sea lion (Zalophus wollebaeki) holds a red-lipped batfish (Ogcocephalus darwini) in its mouth. The sea lion was using the living batfish as a toy, dropping and chasing it as it tried...

Andrew Peacock / Steller's Sea Lion (Eumetopias jubatus) male with females, Inian Islands, Icy Strait, Alaska

Andrew Peacock / Steller's Sea Lion (Eumetopias jubatus) group hauled out on rocks, Inian Islands, Icy Strait, Alaska