Jordi Chias / Gentoo penguins (Pygoscelis papua) swimming together and porpoising in search of krill, Antarctic Peninsula, Antarctica.
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Tony Wu / North Pacific humpback whale (Megaptera novaeangliae kuzira) breaching, Icy Strait, Alaska, USA. July.
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David Fleetham / Humpback whale (Megaptera novaeangliae) breaching, watched by paddle boarder. Canoe Beach, Maui. Hawaii. October 2010. Model released. Digital composite.
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Pedro Narra / Bottlenose dolphin (Tursiops truncatus) porpoising, Sado Estuary, Portugal. October
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Pedro Narra / Bottlenose dolphin (Tursiops truncatus) porpoising, Sado Estuary, Portugal. July
Claudio Contreras / Grey whale (Eschrichtius robustus) breaching, San Ignacio Lagoon, El Vizcaino Biosphere Reserve, Baja California, Mexico, March
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Konrad Wothe / Chub (Squalius cephalus) trying to catch a Banded demoiselle (Calopteryx splendens), Bavaria, Germany, June.
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John Waters / Slow motion clip of a Brown trout (Salmo trutta) breaching to predate an adult Mayfly (Ephemoptera) emerged on the surface, River Kennet, Hungerford, Berkshire, England, UK, June.
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Konrad Wothe / Large group of South American sea lions (Otaria flavescens) swimming at the surface, Palomina Islands, Peru.
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Eric Baccega / Narwhal (Monodon monoceros) at the sea surface. Baffin Island, Nunavut, Canada, June.