Steven Kazlowski / Young Polar bear (Ursus maritimus) standing and trying to balance in shallow water along the Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...

Steven Kazlowski / Young Polar bear (Ursus maritimus) standing and trying to balance in shallow water along the Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...

Steven Kazlowski / Young Polar bear (Ursus maritimus) standing and trying to balance in shallow water along the Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...

Steven Kazlowski / Two curious young Polar bears (Ursus maritimus), Barter Island, off the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, October 2011

Michele Westmorland / Schooling fish around healthy reef system, Castle Rock, Komodo National Park, Indonesia.

Linda Pitkin / 2020VISION / Tube worms (Bispira volutacornis) living between rocks covered in Crustose coralline (Corallinaceae) and red algae (Rhodophyceae), Lundy Island Marine Conservation Zone, Devon, England, UK, May.

Linda Pitkin / 2020VISION / Common Lobster (Homarus gammarus), in a rock crevice, Lundy Island Marine Conservation Zone, Devon, England, UK, May. Did you know? Lobster pincers are different sizes for different uses, one is for c...

Linda Pitkin / 2020VISION / Yellow staghorn sponge (Axinella dissimilis), Lundy Island Marine Conservation Zone, Devon, England, UK, May.

Linda Pitkin / 2020VISION / Pink sea fan / Warty coral (Eunicella verrucosa) with attached eggs of a Common squid (Loligo vulgaris), eggcase of a Lesser-spotted dogfish (Scyliorhinus canicula), and Spiny starfish (Marthasterias...

Mark MacEwen / Green Sea Turtle (Chelonia mydas) returning to sea after Egg laying, Raine Island, Australia. Raine Island is the largest and most important green sea turtle nesting area in the world, with over 14,00...

Steven Kazlowski / Killer whale (Orcinus orca) large pod with one male approaching, in Kenai Fjords National Park, Chiswell Islands National Marine Sanctuary, South Central Alaska, USA

Claudio Contreras / Green Turtle (Chelonia mydas) hatchling on its way to the sea, Ria Lagartos Biosphere Reserve, Yucatan Peninsula, Mexico, August. Endangered species.

Steven Kazlowski / Young Polar bear (Ursus maritimus) in the water along the coast of the Beaufort Sea, Bernard Spit, off the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...

Steven Kazlowski / Young Polar bear (Ursus maritimus) standing and trying to balance in shallow water along the Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...

Steven Kazlowski / Portrait of Polar bear (Ursus maritimus) cub along the Bernard Spit during autumn freeze up, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, October 2011

Steven Kazlowski / Young Polar bear (Ursus maritimus) traveling across newly formed pack ice during autumnal freeze up, off the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska,...

Rob Jordan / 2020VISION / Puffin (Fratercula arctica) with sand eels in beak, Farne Islands, Northumberland, June.

Luiz Claudio Marigo / Jequitiba rosa tree (Cariniana legalis) Tableland Atlantic Rainforest of Vale Natural Reserve, municipality of Linhares, Esparito Santo State, Eastern Brazil, January 2012.

David Tipling / 2020VISION / Arctic Tern (Sterna paradisaea) with sand eel in beak. Farne Islands, Northumberland, July.

David Tipling / 2020VISION / Grey Seal (Halichoerus grypus) hauled out on rocks, in mid-moult. Farne Islands, Northumberland, July.

Roland Seitre / Platypus (Ornithorhynchus anatinus) underwater. Captive. Australian Reptile Park, Gosford, New South Wales.

Claudio Contreras / French Angelfish (Pomacanthus paru) with a Smallmouth Grunt (Haemulon chrysargyreum) and Blade Fire Coral (Millepora complanata). Cancun National Park, Caribbean Sea, Mexico.

Claudio Contreras / Smooth Trunkfish (Lactophrys triqueter). Cancun National Park, Caribbean Sea, Mexico.

Claudio Contreras / Porkfish (Anisotremus virginicus) school. Cancun National Park, Caribbean Sea, Mexico.

Claudio Contreras / Atlantic Sailfish (Istiophorus albicans) attacking school of sardine (Sardinella aurita) bait ball. Isla Mujeres, Caribbean Sea, Mexico.

Claudio Contreras / Green Seaturtle (Chelonia mydas) in profile above sandy shallow sea bed. Endangered, Cancun National Park, Caribbean Sea, Mexico.

Claudio Contreras / Queen Angelfish (Holacanthus ciliaris) among other coral fish. Cancun National Park, Caribbean Sea, Mexico.

Claudio Contreras / Saucereye porgy (Calamus calamus). Cancun National Park, Caribbean Sea, Mexico.

Alex Mustard / 2020VISION / Old male Grey seal (Halichoerus grypus) with mouth wide open showing worn teeth, Lundy Island, Bristol Channel, England, UK, May. 2020VISION Book Plate.

Ernie Janes / Grey seal (Halichoerus grypus) on beach at night with rising moon, Norfolk, UK December

Graham Eaton / An underwater view of a woodland stream, River Glaslyn, Snowdonia NP, Gwynedd, Wales, UK, May

Graham Eaton / Underwater landscape within a mountain stream, showing water turbulence, Snowdonia NP, Gwynedd, Wales, UK, December

Graham Eaton / View looking up a waterfall from within a stream, Snowdonia NP, Gwynedd Wales, UK, December

Graham Eaton / A split-level image of a mountain stream, in autumn, with water droplets on lens, Nant Ffrancon Valley, Snowdonia NP, Gwynedd, Wales, UK, October

Graham Eaton / Underwater view of a rapidly flowing mountain stream, Snowdonia NP, Gwynedd, Wales, UK, November

Graham Eaton / A split-level view through a small waterfall, Llanberis, Snowdonia NP, Gwynedd, Wales, UK, July

Graham Eaton / Underwater view of a mountain lake, Llyn Idwal, Snowdonia NP, Gwynedd, Wales, UK, December

Graham Eaton / Underwater view of a mountain lake with frozen surface, Llyn Idwal, Snowdonia NP, Gwynedd, Wales, UK, December

Graham Eaton / Split level shot of Llyn Idwal and Cwm Idwal, showing freshwater habitat with Green lacustrine algae (Chlorophyceae sp.), Snowdonia NP, Gwynedd, Wales, UK, August

Graham Eaton / Underwater view of a mountain lake, Llyn Idwal, Gwynedd, Snowdonia NP, Wales, UK, December

Graham Eaton / Underwater view of River Glaslyn rapids, Snowdonia NP, Gwynedd, Wales, UK, April

Terry Whittaker / 2020VISION / Common seals (Phoca vitulina) hauled out on saltmarsh, Wallasea Wild Coast Project, RSPB Greater Thames Futurescapes Project, Wallasea Island, Essex, England, UK, October

Inaki Relanzon / Whitsunday Islands, aerial view, Great Barrier Coral Reef, Queensland, Australia, October 2011.

Inaki Relanzon / Whitsunday Islands, aerial view, Great Barrier Coral Reef, Queensland, Australia, October 2011.

Inaki Relanzon / Whitsunday Islands, aerial view with hydroplane landing, Great Barrier Coral Reef, Queensland, Australia, October 2011.

Luiz Claudio Marigo / Corcovado Hill and the Christ Redemptor statue in the Atlantic Rainforest of Tijuca National Park, Rio de Janeiro City, Rio de Janeiro State, Southeastern Brazil, August 2011

Luiz Claudio Marigo / Family of Southern coatis (Nasua nasua) in Atlantic Rainforest, Tijuca National Park, Rio de Janeiro City, Southeastern Brazil.

Pete Oxford / Black grouper (Mycteroperca bonaci) with mouth wide open, Jardines de la Reina National Park, Cuba, Caribbean

Pete Oxford / Caribbean reef shark (Carcharhinus perezi) Jardines de la Reina National Park, Cuba

Luis Quinta / Waterfall in Laurisilva Forest, Madeira Island, April 2009.

Luis Quinta / Pico do Areeiro, Madeira Island, April 2009.

Linda Pitkin / 2020VISION / Portrait of Ballan wrasse (Labrus bergylta), St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, October 2011

Linda Pitkin / 2020VISION / Edible crab (Cancer pagurus), St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, August 2011. Did you know? A large female Edible crab can carry up to 20 million eggs...

Linda Pitkin / 2020VISION / Velvet Swimming Crab (Necora puber / Liocarcinus puber), St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, October, 2011

Linda Pitkin / 2020VISION / Dead man's fingers (Alcyonium digitatum), growing on rock faces below the kelp, St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, October 2011. Did you know? Soft co...

Linda Pitkin / 2020VISION / Common Lobster (Homarus gammarus), St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, October 2011. 2020VISION Book Plate. Did you know? Crustaceans have blue blood,...

Linda Pitkin / 2020VISION / Close-up of Dahlia anemone (Urticina felina / Tealia felina, St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, August 2011

Linda Pitkin / 2020VISION / Dahlia anemone (Urticina felina / Tealia felina), on bed of Common brittlestars (Ophiothrix fragilis), St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, August 2011

Linda Pitkin / 2020VISION / Cliffs showing rock striations and geological folding, Pettico Wick, St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, August 2011

Linda Pitkin / 2020VISION / Atlantic wolf fish (Anarhichas lupus) in a rock crevice, St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, August 2011

Linda Pitkin / 2020VISION / Mute Swan (Cygnus olor) swimming in harbour, viewed from underwater, St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, October 2011. Did you know? In Scotland and Ir...

Linda Pitkin / 2020VISION / Common Sunstar (Crossaster papposus), St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, October 2011

Linda Pitkin / 2020VISION / St Abbs harbour (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, August 2011

Linda Pitkin / 2020VISION / Black brittlestar (Ophiocomina nigra), yellow colour variety, with Common brittlestars (Ophiothrix fragilis), on sea bed, St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotlan...

Steven Kazlowski / Polar bear (Ursus maritimus) curious cub sits up on its hind legs and tries to balance itself, along Bernard Spit in autumn, 1002 area of the Arctic National Wildlife Refuge, Alaska, USA, October

Steven Kazlowski / Polar bear (Ursus maritimus) curious cub sits up on its hind legs, paw raised, and tries to balance itself, along Bernard Spit in autumn, 1002 area of the Arctic National Wildlife Refuge, Alaska, US...

Steven Kazlowski / Polar bear (Ursus maritimus) curious cub stands along Bernard Spit as its mother and other cub rest in the background, 1002 area of the Arctic National Wildlife Refuge, Alaska, USA, October

Andrew Parkinson / Lapwing (Vanellus vanellus) group roosting in the lagoons at Titchwell RSPB Reserve, Norfolk, UK, October.

Graham Eaton / Under the ice scene of freshwater frozen lake. Llyn Dinas, Snowdonia, Wales, December 2010.

Ernie Janes / Ponta de Sao Lourenco Nature Reserve, Madeira

Ernie Janes / Rock cliffs, Ponta de Sao Lourenco Nature Reserve, Madeira

Georgette Douwma / Soft coral and other invertebrates growing on mangrove roots (Rhizophora sp.) on the edge of coral reef. Raja Ampat, Indonesia.

Georgette Douwma / Bigeye Scad (Selarcrumenophthalmus). Misool, Raja Ampat, West Papua, Indonesia.

Georgette Douwma / Bubble Tip Anemone (Entacmaea quadricolor). The tentacles are usually a dull brown, but this anemone is partially bleached and has lost most of the endosymbiotic zooxanthellae. Raja Ampat, West Papua,...

Georgette Douwma / Plastic bags floating at the surface of the sea. Bunaken National Park, North Sulawesi, Indonesia.

Anup Shah / Proboscis monkey (Nasalis larvatus) male walking across the mudflats of a mangrove swamp revealed at low tide with the sea in the background, Bako National Park, Sarawak, Borneo, Malaysia, March

Graham Eaton / Split level image of Cwm Idwal and Llyn Idwal showing lake and mountain habitat and lacustrine algae, Snowdonia NP, North Wales, UK, January 2010. Winner of the Living Landscape: Connectivity categor...

Terry Whittaker / 2020VISION / Common / Harbour seals (Phoca vitulina) hauled out on mudflats at saltmarsh, Wallasea Island RSPB reserve, Essex, UK, March 2011

Georgette Douwma / Leather Coral (Sinularia flexibilis). Komodo National Park, Indonesia.

Georgette Douwma / Barrel Sponge (Xestospongia testudinaria) on coral reef with soft corals (Scleronephthya sp), gorgonian and Lyretail anthias (Pseudanthias squamipinnis). Komodo National Park, Indonesia.

Georgette Douwma / Black-blotched Porcupinefish / Short-spine Porcupinefish (Diodon liturosus) and a Klein's butterflyfish (Chaetodon kleinii) sheltering in barrel sponge. Komodo National Park, Indonesia.

Georgette Douwma / Soft Coral (Dendronephthya sp) with Blueline snappers (Lutjanus kasmira). Rinca, Komodo National Park, Indonesia.

Georgette Douwma / Hawksbill Turtle (Eretmochelys imbricata) swimming down after taking a breath. Rinca, Komodo National Park, Indonesia.

Georgette Douwma / Painted Frogfish (Antennarius pictus), juvenile perched on bottle top. Rinca, Komodo National Park, Indonesia.

Peter Cairns / 2020VISION / Sunrise over coastal mudflats with Shelduck feeding (Tadorna tadorna), Campfield Marsh RSPB reserve, Bowness, Solway Firth, Cumbria, UK, April 2011

Peter Cairns / 2020VISION / Sunrise over coastal mudflats, Campfield Marsh RSPB reserve, Bowness, Solway Firth, Cumbria, UK, April 2011

Pete Oxford / Two Common Bottlenose Dolphin (Tursiops truncatus) in shallow water. Punta Allen, Sian Ka'an Biosphere Reserve, Quintana Roo, Yucatan Peninsula, Mexico.

Juergen Freund / Rangers catching a Green turtle (Chelonia mydas) for tagging and release, Tetepare Island reserve, Solomon Islands, July 2010

Juergen Freund / Coral reef with hard corals and cabbage coral, Komodo NP, Indonesia

Juergen Freund / Split level of snorkeler over coral reef on white sandy seabed contrasting with dry topside landscape in background, Komodo NP, Indonesia, August 2009. Model released.

Eric Baccega / Polar Bear (Ursus maritimus) mother with her 3-month cub, soon after emerging from their hibernation den. Wapusk National Park, Manitoba, Canada, March.

Eric Baccega / Polar Bear (Ursus maritimus) mother resting while her 3-month cubs play. Wapusk National Park, Manitoba, Canada, March.

Juergen Freund / Detail of eye of Parrotfish (Scarus rivulatus) Komodo NP, Indonesia

Juergen Freund / Sea apple (Pseudocolochirus violaceus) with tentacles exposed, feeding, Komodo NP, Indonesia, Indo-pacific.

Juergen Freund / Clown anemonefish (Amphiprion percula) on bleached coral, Komodo NP, Indonesia, Indo-pacific.

Juergen Freund / Zebra / Adam's urchin crab with eggs (Zebrida adamsii) on Fire sea urchin (Mespilia globulus), Komodo NP, Indonesia, Indo-pacific.