Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) pup stretching, Mosquera Island, Galapagos Islands, Ecuador

Claudio Contreras / Grey whale (Eschrichtius robustus) breaching, San Ignacio Lagoon, El Vizcaino Biosphere Reserve, Baja California, Mexico, March

Claudio Contreras / Grey whale (Eschrichtius robustus) tail, San Ignacio Lagoon, El Vizcaino Biosphere Reserve, Baja California, Mexico, March

Claudio Contreras / Grey whale (Eschrichtius robustus) calf, San Ignacio Lagoon, El Vizcaino Biosphere Reserve, Baja California, Mexico, February

Mark Carwardine / Grey whale (Eschrichtius robustus) at water surface with mouth open showing baleen plates, San Ignacio Lagoon, Baja California, Mexico

Richard Robinson / Snares crested penguin (Eudyptes robustus) on rock washed with sea surf, Snares (Tine Heke) Sub Antarctic Island Group, Southern Ocean, New Zealand. December 2016. Editorial use only.

Tui De Roy / Snares Crested penguin (Eudyptes robustus) group walking up granite slope into Oleander forest, Station Point colony. Snares Island, New Zealand Sub-Antarctic Islands.

Tony Wu / Grey whale (Eschrichtius robustus) calf at ocean surface, with its mother visible, Magdalena Bay, Baja California, Mexico.

Mark MacEwen / Snares island crested penguin (Eudyptes robustus) colony in forest, Snares Island, New Zealand.

Mark MacEwen / Snares island crested penguin (Eudyptes robustus) in forest, Snares Island, New Zealand.

Mark MacEwen / Snare's island crested penguin (Eudyptes robustus) colony on the coast, high angle view, Snares Island, New Zealand.

Tui De Roy / Snares Crested penguin (Eudyptes robustus) bathing in freshwater pool, Snares Island, New Zealand Sub-Antarctic Islands. Endemic and vulnerable species.

Tui De Roy / Snares-crested penguin (Eudyptes robustus) walking along rocks, Snares Island, New Zealand Sub-Antarctic Islands. Endemic and vulnerable species.