Pascal Kobeh / False clown anemonefish (Amphiprion ocellaris) in a magnificent sea anemone (Heteractis magnifica), Sulu sea, Philippines

Alex Mustard / Whale shark (Rhincodon typus) close to the camera with a golden trevally fish (Gnathanodon speciosus) and outline of another whale shark behind , in the plankton-rich green waters of La Paz bay, Baja...

Alex Mustard / Pair of Western clown anemonefish (Amphiprion ocellaris) spawning orange eggs on the rock beneath their Magnificent sea anemone (Heteractis magnifica) home on a coral reef. This photo shows the larger...

John Shaw / Large leaves on Pacific blackberry (Rubus ursinus) above bracken fern and horsetail, is a small wet area. Oregon, USA. June.

Doc White / Sea Otter, (Enhydra lutris), young male, Elkhorn Slough, California, USA. January

John Chan / Two male Southern Pacific rattlesnakes (Crotalus oreganus helleri) fighting during mating season. This behaviour is known as a "combat dance", and is used to determine dominance and the right to mate...

John Chan / California sea lion (Zalophus californianus) feeding on a Striped bass (Morone saxatilis), Southern California, USA.

SCOTLAND: The Big Picture / Common dolphin (Delphinus delphis) jumping out the water, Shetland, Scotland, UK, January.

Jeff Foott / Mountain Dogwood (Cornus nuttallii) flowering, Merced River, Yosemite National Park, California

Jeff Foott / Mountain Dogwood (Cornus nuttallii) flowering, Merced River, Yosemite National Park, California

Jeff Foott / Mountain Dogwood (Cornus nuttallii) flowering, Merced River, Yosemite National Park, California

Jeff Foott / Mountain Dogwood (Cornus nuttallii) flowering, Merced River, Yosemite National Park, California

Jeff Foott / Mountain Dogwood (Cornus nuttallii) flowering, Merced River, Yosemite National Park, California

Franco Banfi / Three False clownfish (Amphiprion ocellaris) in Sea anemone (Heteractis magnifica) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.

Claudio Contreras / Prickly pear (Opuntia sp.) growing on coastline, Socorro Island, Revillagigedo Archipelago National Park (Socorro Islands), Pacific Ocean, Western Mexico, November, Honorary Mention in the third natio...

John Waters / Small group of Rainbow trout (Oncorhynchus mykiss) swimming in the River Kennet, Berkshire, England, UK, March.

Ingo Arndt / Fan Coral (Echinogorgia sp) from Indo-Pacific, in collection at Senckenberg Museum, Frankfurt, Germany.

Ingo Arndt / Mastigias jellyfish (Mastigias sp) with mass of jellyfish in background, Jellyfish lake, Palau, Western Pacific Islands, Micronesia

Ingo Arndt / Mass of Mastigias jellyfish (Mastigias sp) in Jellyfish lake, Palau, Western Pacific Islands, Micronesia, March 2009

Claudio Contreras / Great Frigatebird (Fregata minor) departing from nest, San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Isl...

Doc White / California sea otter (Enhydra lutris) feeding on Northern kelp crab, Monterey Bay, California, USA, Eastern Pacific Ocean, May

Alex Mustard / Brandt's cormorant (Phalacrocorax penicillatus) hunts for a meal in a school of Pacific chub mackerel (Scomber japonicus) beneath an oil rig. Eureka Rig, Los Angeles, California, USA, September

Tony Wu / Humpback whales (Megaptera novaeangliae) bubble net feeding with mouths open at surface, example of cooperative hunting, Chatham Strait, Alaska, USA July

Alex Mustard / Brandt's cormorant (Phalacrocorax penicillatus) hunts for a meal in a school of Pacific chub mackerel (Scomber japonicus), beneath an oil rig. Eureka Rig, Los Angeles, California, United States of Ame...

Alex Mustard / Harbour seal (Phoca vitulina) in the kelp forest (Macrocystis pyrifera). Santa Barbara Island, Channel Islands. Los Angeles, California, United States of America. North 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...

Alex Mustard / Western clownfish (Amphiprion oceallaris) in a Magnificent sea anemone (Heteractis magnifica). Yillet Kecil, MIsool, Raja Ampat, West Papua, Indonesia. Ceram Sea

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...

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) mother watching cub catching salmon, Katmai National Park, Alaska, USA, August

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cubs with salmon, Katmai National Park, Alaska, August. Small reproduction only.

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cubs with salmon, Katmai National Park, Alaska, August. Small reproduction only.

Floris van Breugel / Black and white photograph of humpback whale (Megaptera novaeangliae) tail slapping at surface, Glacier Bay National Park, Alaska, USA, August 2014.

Pascal Kobeh / Multitudes of Moon jellyfish (Aurelia labiata), Alaska, USA, Gulf of Alaska. Pacific ocean.

Pascal Kobeh / Sea otter (Enhydra lutris) floating on its back at surface among kelp, Alaska, USA. Gulf of Alaska, Pacific ocean.

Pascal Kobeh / Group of California sea lions (Zalophus californianus) in a 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.

Claudio Contreras / Giant Manta Ray (Manta birostris) at cleaning station with Clarion Angelfish (Holacanthus clarionensis) San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (The Socorro Islands), Pacific...

Claudio Contreras / Giant Manta Ray (Manta birostris), San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexico. Vulnerable species.

Charlie Summers / Black Bear (Ursus americanus) with Pink Salmon (Oncorhynchus gorbuscha) catch, Anan Creek, Alaska, July.

David Pattyn / Temperate rainforest scenic with ancient Red cedar tree (Thuja plicata). Pacific Rim National Park, Vancouver Island, British Columbia, Canada, August.

David Pattyn / Western Red Cedar trees (Thuja plicata) in temperate rainforest. Cathedral grove in MacMillan provincial park, Vancouver Island, British Columbia, Canada, August.

Chris & Monique Fallows / Pink Salmon (Oncorhynchus gorbuscha) migrating in small shallow river, Prince William Sound, Alaska, USA.

Alex Mustard,Alex Mustard / Rainbow trout (Oncorhynchus mykiss) under trees, Capernwray Lake, Lake District, England, UK.

David Tipling / Tribal performers from Hagen at Sing-sing, Mount Hagen Show in Western Highlands Papua New Guinea. Headress contains Papuan Lorikeet birds and King of Saxony plumes. August 2011

David Tipling / Tribal performers from the Anglimp District in Waghi Province, performing at a Sing-sing - Hagen Show, Western Highlands, Papua New Guinea, August 2011

David Tipling / Tribal performer from the Anglimp District in Waghi Province Western Highlands Papua New Guinea performing at a Sing-sing, Hagen Show Western Highlands Papua New Guinea.With bird of paradise plumes in...

David Tipling / Roika Waria Sing-sing group from Hagen at the Hagen Show in Western Highlands Papua New Guinea. August 2011

David Tipling / Men of Mendi from the Southern Highlands at Hagen Show, Western Highlands, Papua New Guinea. Head dress has King of Saxony plumes and breast shield of Superb Bird of Paradise plus plumes from Blue bir...

Mark Carwardine / Pacific white-sided dolphin / Lag (Lagenorhynchus obliquidens) swimming fast, showing dorsal fin, Johnstone Strait, Vancouver Island, British Columbia, western Canada

Floris van Breugel / Staghorn corals (Acropora) on the coast of tropical island Ofu, one of the Manu'a islands, American Samoa. 2012.

Floris van Breugel / Tiny thimble jellyfish (Linuche unguiculata) drift with the current in the calm turquiose waters of a lagoon in Ofu, American Samoa. The window of sky is called Snell's Window, caused by refraction of...

Floris van Breugel / Turquoise waters of the lagoon along Ofu's National Park beach, American Samoa. January 2012.

Floris van Breugel / Sprouting Coconut palm on stony beach on the south shore of Tutuila, American Samoa. January 2012.

Steven Kazlowski / Crew bleeds a full deckload of Pacific cod fish (Gadidae family) before putting them in salt water tanks, on the fishing trawler Western Dawn, Gulf of Alaska, USA. No release available.

Juergen Freund / Anthea Melsen smiles shyly as she comes out of the water after looking at her grandfather's coral and clam gardens, Onma Lodge, Kolombangara, Western Province, Solomon Islands, July 2010

Juergen Freund / Cultured corals are propagated by cutting fragments of corals from mother colonies or brood stock. These coral pieces are attached to concrete mounts until they grow into a new colony, Onma Lodge, Kol...

Juergen Freund / Erik Koti holds some of his coral pieces. Cultured corals are propagated by cutting fragments of corals from mother colonies or brood stock. These coral pieces are attached to concrete mounts until it...

Suzi Eszterhas / Western Gull (Larus occidentalis) portrait, with nesting material in beak, Monterey Bay, California, USA, April

Michael Durham / Bald-faced Hornet (Dolichovespula maculata) flying, western Oregon

Michael Pitts / Mastigias jellyfish {Mastigias sp.} massed at surface, Palau, Western Pacific Islands

Michael Pitts / Diver amongst Mastigias jellyfish {Mastigias sp.} Palau, Western Pacific Islands

Michael Durham / A three year old boy with a Pacific Tree Frog (Pseudacris regilla)

Juergen Freund / Australian sea lion {Neophoca cinerea} portrait underwater, Fisherman's Island, Batavia Coast, Western Australia

Chris Newbert / Blackfinned Clownfish (Amphiprion percula) in a Magnificent Sea Anemone (Heteractis magnifica) 40 feet deep, Solomon Islands

Michael Durham / Western Long-eared Myotis (Myotis evotis) about to drink from a man-made guzzler, high-desert transition zone in the Deschutes National Forest, Oregon

Michael Durham / Western Pipistrelle (Pipistrellus hesperus) bat flying over desert scrub, near Pine Creek in the John Day Fossil Beds National Monument, Clarno Unit, Oregon, this is the smallest bat found north of Me...

Michael Durham / Western Pipistrelle (Pipistrellus hesperus) bat chases a moth over desert scrub, near Pine Creek in the John Day Fossil Beds National Monument, Clarno Unit, Oregon

Michael Durham / Western Gull (Larus occidentalis) flock flying over the Oregon coast

Michael Durham / Pacific Chorus Frog (Pseudacris regilla) jumping into pond, Oregon

Michael Pitts / Mastigias jellyfish {Mastigias sp.} Palau, Western Pacific Islands

Michael Pitts / Mastigias jellyfish {Mastigias sp.} Palau, Western Pacific Islands

Chris Newbert / Blackfinned Clownfish (Amphiprion percula) pair in Magnificent Sea Anemone (Heteractis magnifica) host, Solomon Islands

Birgitte Wilms / Blackfinned Clownfish (Amphiprion percula) in bleached Sea Anemone host, 30 feet deep, Solomon Islands

Chris Newbert / Blackfinned Clownfish (Amphiprion percula) in a Magnificent Sea Anemone (Heteractis magnifica) host, Solomon Islands

Norbert Wu / Blackfinned Clownfish (Amphiprion percula) pair, safe among stinging tentacles host Magnificent Anemone (Heteractis magnifica), Solomon Islands

RICHARD KIRBY / Bower of the Vogelkop gardener bowerbird (Amblyornis inornata) built by the male to attract a female, Irian Jaya / West Papua, Western New Guinea

Michael Pitts / Mass of Mastigias jellyfish at surface Palau, Western Pacific Islands

Richard Du Toit / Indo-pacific Bottlenose Dolphin (Tursiops aduncus) pod surfing wave, Western Cape, South Africa

Richard Du Toit / Indo-pacific Bottlenose Dolphin (Tursiops aduncus) pod surfing wave, Western Cape, South Africa

Richard Du Toit / Indo-pacific Bottlenose Dolphin (Tursiops aduncus) pod surfing wave, Western Cape, South Africa

Richard Du Toit / Indo-pacific Bottlenose Dolphin (Tursiops aduncus) pod surfing wave, Western Cape, South Africa

Alex Mustard / Western clown anemonefish (Amphiprion ocellaris) poses with a large, dominant female behind. The clownfish in the foreground is probably a juvenile. Bitung, North Sulawesi, Indonesia. Lembeh Strait, M...

Doc White / Risso's dolphin (Grampus griseus) female and calf aged two days, swimming at surface. California, USA.

Doc White / Risso's dolphin (Grampus griseus) female and calf aged two days, swimming at surface. Calf with head out of water, many scars on female. California, USA.

Doc White / Risso's dolphin (Grampus griseus) female and calf aged two days, swimming at surface, exhaling. California, USA.

Doc White / Risso's dolphin (Grampus griseus) female and calf aged two days, swimming at surface. California, USA.

Doc White / Northern right whale dolphin (Lissodelphis borealis) pod, viewed from above. California, USA.

Doc White / Northern right whale dolphin (Lissodelphins borealis) swimming at surface within pod. California, USA.

Juan Carlos Munoz / Sunset over Pacific Ocean. La Jolla, San Diego, California, USA.

Juan Carlos Munoz / Pacific Ocean at sunset. La Jolla, San Diego, California, USA.

Juan Carlos Munoz / Brown pelican (Pelecanus occidentalis)in flight over coast. La Jolla, San Diego, California, USA. February.

Heather Angel / Frog (Rana temporaria) spawn amongst invasive Fairy fern (Azolla filiculoides) from garden pond. Photographed in aquarium, controlled conditions. Surrey, England, UK. March.

Heather Angel / Fairy fern (Azolla filiculoides) and Water forget me not (Myosotis scorpioides) in frozen garden pond. Surrey, England, UK. January.

Alex Mustard / Pair of California sea lion (Zalophus californianus) pups playing in shallow water. Los Islotes, La Paz, Baja California Sur, Mexico. Sea of Cortez, Gulf of California, East Pacific Ocean.

Alex Mustard / Pair of crown-of-thorns sea stars (Acanthaster planci) feeding on a coral colony. La Paz, Baja California Sur, Mexico. Sea of Cortez, Gulf of California, East Pacific Ocean.