Tui De Roy / Marine iguana (Amblyrhynchus cristatus), Punta Vicente Roca, Isabela Island, Galapagos

Tui De Roy / Marine iguanas (Amblyrhynchus cristatus) fighting, Punta Vicente Roca, Isabela Island, Galapagos

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) group on rocks, Cape Douglas, Fernandina Island, Galapagos

Tui De Roy / Marine iguana (Amblyrhynchus cristatus), Punta Espinosa, Fernadina Island, Galapagos

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

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) on shore, Punta Moreno, Isabela Island, Galapagos

Shane P. White / Coconut Palm (Cocos nucifera) tree on beach, Port Olry, Espiritu Santo, Vanuatu

Shane P. White / Coconut Palm (Cocos nucifera) tree on coast, Aimbuei Bay, Aore Island, Vanuatu

Shane P. White / Coconut Palm (Cocos nucifera) tree on coast, Aimbuei Bay, Aore Island, Vanuatu

Shane P. White / Alexandrian Laurel (Calophyllum inophyllum) tree on coast, Aimbuei Bay, Aore Island, Vanuatu

David Fleetham / Humpback whale (Megaptera novaeangliae) breaching, watched by paddle boarder. Canoe Beach, Maui. Hawaii. October 2010. Model released. Digital composite.

Nick Hawkins / Rocks and coastal rainforest. Cocos Island National Park, Costa Rica. 2018.

Nick Hawkins / Marine iguana (Amblyrhynchus cristatus) basking on volcanic rock at coast. Isabela Island, Galapagos.

Nick Hawkins / Fish seeking shelter around floating tree in open ocean. Off coast of Cocos Island National Park, Costa Rica.

Tui De Roy / Galapagos lava lizard (Microlophus albemarlensis) sitting on Marine iguana (Amblyrhynchus cristatus) Punta Espinosa, Fernandina Island, Galapgos.

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) in water, Puerto Egas, Santiago Island, Galapagos

Tui De Roy / Marine iguanas (Amblyrhynchus cristatus) silhouettes at sunset, Punta Vicente Roca, Isabela Island, Galapagos

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) males in breeding colouration on rocks, with sun halo, Floreana Island, Galapagos

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) group on rock in the waves, Cape Hammond, Fernandina Island, Galapagos

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) swimming underwater, Sullivan Bay, Santiago Island, Galapagos

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) in the surf, Black Beach, Floreana Island, Galapagos

Tui De Roy / Blue-footed booby (Sula nebouxii), group of eight diving into sea to fish. Punta Gavilanes, Fernandina Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii) diving towards sea, folding wings. Northeast coast, Santiago Island, Galapagos. Sequence 1/2.

Tui De Roy / Blue-footed booby (Sula nebouxii) perched on rock at coast. Santa Fe Island, Galapagos. August 2015.

David Fleetham / Whale shark (Rhincodon typus), a commercial encounter for tourists with feeder above on canoe. Oslob, Cebu, Philippines. April 2017.

Claudio Contreras / Olive Ridley Sea Turtle (Lepidochelys olivacea) nesting, Arribada (mass nesting event), Playa Morro Ayuta, Oaxaca state, southern Mexico. Vulnerable species.

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...

Frederique Olivier / Large flock of Guanay cormorants (Phalacrocorax bougainvilli) flying to feed, Ballestas Islands, Peru.

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.

Konrad Wothe / Large group of South American sea lions (Otaria flavescens) swimming at the surface, Palomina Islands, Peru.

Ingo Arndt / American Crocodile (Crocodylus acutus) swimming in open ocean, Pacific Coast, Ostional, Costa Rica

Ingo Arndt / Villagers collecting eggs from Olive ridley sea turtles (Lepidochelys olivacea) during the first two days of the arribada (mass nesting event). This is the only place in the world where it is legal to...

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) digging their nests by night with stars during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) females coming ashore at twilight during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) females coming ashore during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Richard Robinson / Shortfin mako shark (Isurus oxyrinchus) head on just below surface, another in background, off the West Coast of Auckland, New Zealand, February

Richard Robinson / Shortfin mako shark (Isurus oxyrinchus) profile portrait, just below surface, off the West Coast of Auckland, New Zealand, February

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 / Nudibranchs (Doto greenamyeri) newly described species on feather hydroids. Seraya Bay, north coast of Bali, Indonesia. Java Sea.

Doug Perrine / False killer whale (Pseudorca crassidens) pod, off the Kona Coast of Hawaii Island, Hawaiian Islands, USA. January.

Roy Mangersnes / Marine iguana (Amblyrhynchus cristatus) feeding in deep water to find algae, off the coast of Fernandina island on Galapagos. April 2016. Much of the algae on coast and at shallower depths have been k...

Roy Mangersnes / Marine iguana (Amblyrhynchus cristatus) feeding in deep water to find algae, off the coast of Fernandina island on Galapagos. April 2016. Much of the algae on coast and at shallower depths have been k...

Jeff Foott / Pacific Rhododendron (Rhododendron macrophyllum) flowering in old growth Coast Redwood (Sequoia sempervirens) forest, Redwood National Park, California

Brent Stephenson / Australasian gannet (Morus serrator) flying with waves breaking below, Muriwai, Auckland, New Zealand, October.

Juergen Freund / Gorgonian fan coral (Gorgonaceae) in the shallow mangroves, split level. North Raja Ampat, West Papua, Indonesia. Second Place in the Portfolio Award of the Terre Sauvage Nature Images Awards Competit...

Juergen Freund / Mud crab (Scylla serrata) in shallow sandy water. Split level with island and thatched house on stilts. Moromahu Island, Wakatobi, South Sulawesi, Indonesia. Second Place in the Portfolio Award of the...

Juergen Freund / Schooling silversides (Atheriniformes) split level with karst limestone cliff and West Papuan fishermen in their dugout outrigger canoe. Raja Ampat, Indonesia. Second Place in the Portfolio Award of t...

Alex Mustard / Portrait of Sally lightfoot crab (Grapsus grapsus) on a beach. San Cristobal Island, Galapagos Islands, Ecuador. Tropical East Pacific Ocean.

Richard Robinson / Blue shark (Prionace glauca) viewed from below, off the coast of Hawke's Bay, New Zealand, February.

Richard Robinson / Blue shark (Prionace glauca) worked from below with rays of sun, off the coast of Hawke's Bay, New Zealand, February.

Sean Crane / Bat Star (Asterina miniata) trio at low tide, Montana De Oro State Park, Los Osos, California

Juergen Freund / Split level of large Purple crown jellyfish (Netrostoma setouchina) in shallows of mangroves. Mali Island, Macuata Province, Fiji, South Pacific.

Richard Robinson / Featherstar (Crinoidea) on red coral (Errina novazelandiae) in Doubtful Sound, Fiordland National Park, New Zealand.

Jordi Chias / Juvenile green turtle (Chelonia mydas) reflected in the surface of the window with Snell's window affect, Fakarava atoll inside lagoon at sunset, Tuamotu archipelago, French Polynesia; Pacific Ocean

Richard Robinson / Maui's dolphin (Cephalorhynchus hectori maui) Critically Endangered, the world's smallest and rarest marine dolphin. Endemic to North Island, New Zealand. October. Editorial use only.

Richard Robinson / Hector's dolphins (Cephalorhynchus hectori) Akaroa Harbour, South Island, New Zealand, November. Editorial use only.

Richard Robinson / Hector's dolphin (Cephalorhynchus hectori) Akaroa Harbour, South Island, New Zealand, November. Editorial use only.

Richard Robinson / Maui's dolphins (Cephalorhynchus hectori maui) Critically Endangered, the world's smallest and rarest marine dolphin. Endemic to North Island, New Zealand, March. Editorial use only.

Bertie Gregory / Humpback whale (Megaptera novaeangliae) adult breaching, Vancouver Island, British Columbia, Canada, July.

Alex Mustard / Spotted handfish (Brachionichthys hirsutus) portrait, Derwent River estuary, Hobart, Tasmania, Australia

Sergey Gorshkov / Polar Bear (Ursus maritimus) group scavenging on Pacific Walrus (Odobenus rosmarus divergens) carcass, Wrangel Island, Russia

Claudio Contreras,Claudio Contreras / Discarded nets, bangka canoe and other garbage at the beach, Guindacpan Island, Danajon Bank, Central Visayas, Philippines, April 2013

Michael Pitts,Michael Pitts / Engine room ventilator shafts of oil tanker 'Seiko Maru'. Sunk in Chuuk Lagoon 17/18th February 1944, Chuuk Lagoon, Pacific

Juergen Freund / Aerial view of Whitehaven Beach - a seven kilometre stretch of pure white sand, Coral Sea, Pacific Ocean, August 2011

Juergen Freund / Aerial view of Hardy Reef with float planes, Great Barrier Reef, Australia, August 2011

Juergen Freund / Aerial view of Hamilton Island sailing race, off the coast of Queensland, Australia, August 2011

Juergen Freund / Aerial view of Hamilton Island sailing race, off the coast of Queensland, Australia, August 2011

Igor Shpilenok,Igor Shpilenok / Kamchatka Brown Bear (Ursus arctos beringianus) on the Pacific coast of Kamchatka. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, July.

Igor Shpilenok,Igor Shpilenok / A Kamchatka Brown Bear (Ursus arctos beringianus) standing in breaking waves. Pacific coast of Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, July.

Roland Seitre / Olive Ridley Sea Turtle (Lepidochelys olivacea) females coming ashore to lay eggs during an arribada nesting event, Ostional Beach, Costa Rica

Ingo Arndt / Olive Ridley Sea Turtle (Lepidochelys olivacea) hatchlings emerging from the nest and making their way to the sea at sunrise, Ostional Beach, Costa Rica

Denis-Huot / Killer whales (Orcinus orca) off the coast of British Columbia, North Pacific Ocean

Tim Fitzharris / Ruby Beach, Olympic National Park, Washington

Mark Carwardine / Aerial view of adult female Blue whale (Balaenoptera musculus), Sea of Cortez (Gulf of California), Baja California, Mexico (Pacific coast), Endangered species

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

Andy Trowbridge / Gibson's Albatross / Toroa (Diomedea antipodensis gibsoni) or Kaikoura Coast, Kaikoura, South Island, New Zealand. January.

Paul D Stewart / Illustration of Giant Octopus (Octopus dofleini) attacking a ship, 1815 copperplate engraving from Bertuch's 'Bilderbuch fur kinder' 16 plate 5. with contemporary colour. 'Colosal Polypus' (octopus) a...

Matthew Maran / Waterfall on the the Darling River with a fallen tree as a bridge over the waters. West Coast Trail, Pacific Rim National Park Reserve, west coast of Vancouver Island, Canada, September 2010.

Matthew Maran / Surfer Benj Yougson at Long Beach. Pacific Rim National Park Reserve, west coast of Vancouver Island, Canada, September 2010. Model released

Matthew Maran / Driftwood on a beach with the coastline stretching to the horizon. Wickaninnish Beach, Pacific Rim National Park Reserve, West coast of Vancouver Island, Canada, September 2010.

Matthew Maran / Dramatic seas crashing onto a rocky shore. The Broken Group Islands from The Wild Pacific Trail, Ucluelet, West coast of Vancouver Island, Canada, September 2010.

Matthew Maran / Hikers crossing a thin footbridge over a river. The West Coast Trail, Pacific Rim National Park, Vancouver Island, Canada, September 2010, model released

Matthew Maran / Hikers building up a fire in their cliff-overhang cave. The West Coast Trail, Pacific Rim National Park, Vancouver Island, Canada, September, Model released

Matthew Maran / A man sitting in the cable car of a chair bridge as it crosses a river. The West Coast Trail, Pacific Rim National Park, Vancouver Island, Canada, September 2010. Model released

Matthew Maran / A man looking out to sea by coastal rock stacks. The West Coast Trail, Pacific Rim National Park, Vancouver Island, Canada, September 2010. Model released.

Matthew Maran / Hikers talking as they warm themselves by a campfire on a beach. The West Coast Trail, Pacific Rim National Park, Vancouver Island, Canada, September 2010. Models released.

Matthew Maran / A hiker building a fire at his campsite. The West Coast Trail, Pacific Rim National Park, Vancouver Island, Canada, September 2010. Model released.

Matthew Maran / Two people pausing on a woodland path. The West Coast Trail, Pacific Rim National Park, Vancouver Island, Canada, September 2010. Model released.

Juergen Freund / Baby green turtle (Chelonia mydas) hatchling in the shallows of the beach, swimming out to sea. Anano Island, Wakatobi, South Sulawesi, Indonesia, November

Shattil & Rozinski / Sea otter (Enhydra lutris) mother and pup off the coast, British Columbia, Canada, Pacific Ocean, September

Shattil & Rozinski / Pacific white-sided dolphin (Lagenorhynchus obliquidens) surfacing off the coast of British Columbia, Canada, September

Claudio Contreras / Guadalupe fur seal (Arctocephalus townsendi) pup playing underwater, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, March

Claudio Contreras / Northern elephant seal (Mirounga angustirostris) weaner / juvenile head portrait, with head turned to look at camera, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, Febr...

Claudio Contreras / Pair of Northern elephant seals (Mirounga angustirostris) male holding female during copulation, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, January

Claudio Contreras / Pink abalone (Haliotis corrugata) shell detail, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, January

Claudio Contreras / Great white shark (Carcharodon carcharias) passing divers cage, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, Pacific ocean, September