Eric Baccega / Grizzly bear (Ursus arctos horribilis) catching salmon in Brooks river, Katmai National Park, Alaska, USA, July
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David Shale / Shoal of Red piranha {Serrasalmus nattereri} Santarem, Brazil
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Jurgen Freund / River Basslets {Grammidae} Florida, USA
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Pete Oxford / Giant arapaima {Arapaima gigas} the largest freshwater fish, captive, Brazil
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Edwin Giesbers / Dalmatian pelican (Pelicanus crispus) group squabbling over fish, Lake Kerkini, Greece.
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Terry Whittaker / Brown trout (Salmo trutta) leaping up waterfall to reach spawning grounds upstream. River Endrick, Loch Lomond and The Trossachs National Park, Scotland, UK. July.
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Terry Whittaker / Atlantic salmon (Salmo salar) leaping up waterfall to reach spawning grounds upstream. River Endrick, Loch Lomond and The Trossachs National Park, Scotland, UK. July.
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Philippe Clement / Female Common kingfisher (Alcedo atthis) diving and catching a Nine-spined stickleback (Pungitius pungitius) fish, stuns and eats it, Belgium, June.
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Danny Green / Kermode bear (Ursus americanus kermodei) standing on roots at water's edge, hunting for fish. British Columbia, Canada, September.
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Brandon Cole / Piraputanga (Brycon hilarii) fish swimming in clear river with trees visible overhead. Brazil, South America.
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Nick Hawkins / Atlantic sturgeon (Acipenser sturio), Minas Basin of the Bay of Fundy, Canada. July 2019.
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Nick Hawkins / Common shiners (Luxilus cornutus) school below lilly pads in lake, Nova Scotia, Canada. July.
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David Hall / Split level of a Sockeye salmon (Oncorhynchus nerka) in shallow water; Adams River, British Columbia, Canada. October.
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David Hall / Split level of Sockeye salmon (Oncorhynchus nerka) during migration; Adams River, British Columbia, Canada. October.
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David Hall / Sockeye salmon (Oncorhynchus nerka) migration, Adams River, British Columbia, Canada. October.
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David Hall / Sockeye salmon (Oncorhynchus nerka) migration, Adams River, British Columbia, Canada. October.
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Fred Olivier / Orange clownfish (Amphiprion percula) living in association with a Haddon's sea anemone (Stichodactyla haddoni), Marovo Lagoon, Solomon Islands.
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Morley Read / Aerial shot tracking over a cattle farm cut out of the Amazon rainforest, the farm has fish ponds for raising Tilapia and is surrounded by primary rainforest, Napo Province, Ecuador, 2017.
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Alex Mustard / Forster's hawkfish (Paracirrhites forsteri) on a coral reef. Jackson Reef, Tiran, Sinai, Egypt. Strait of Tiran, Gulf of Aqaba, Egypt.
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Alex Mustard / Whitemargin stargazer (Uranoscopus sulphureus) sets an ambush in the sand at night. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
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Nick Hawkins / Chum salmon (Oncorhynchus keta) migrate up a small river near Bella Bella, British Columbia, Canada. September
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Nick Hawkins / Atlantic salmon (Salmon salar) under river ice. Quebec, Canada. October.
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David Pattyn / Great crested grebe (Podiceps cristatus) adult with freshly caught fish. Tench (Tinca tinca) to feed to its young chick, Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, June
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Duncan Murrell / Rock flagtail (Kuhlia rupestris) fish in river on the Southern Lagoon, Forgotten Coast, Lagoons of New Caledonia: Reef Diversity and Associated Ecosystems UNESCO World Heritage Site. New Caledonia.
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Georgette Douwma / Banggai cardinalfish (Pterapogon kauderni) with a Corkscrew or Long tentacle anemone (Macrodactyla doreensis). Lembeh Strait, North Sulawesi, Indonesia.
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Nick Upton / European eel (Anguilla anguilla) elver migrating upstream, using an eel pass on the side of a weir, Somerset Levels, England, UK, July.
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Brian Bevan / Slow motion clip of a male Kingfisher (Alcedo atthis) eating a fish, Bedfordshire, England, UK, July.
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Brian Bevan / Slow motion clip of a male Kingfisher (Alcedo atthis) taking fish into nest hole before exiting backwards, Bedfordshire, England, UK, July.
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Kerstin Hinze / Male Common european toad (Bufo bufo) in amplexus with a dead fish, Lower Saxony, Germany, April.
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Andy Rouse / RF - Giant Otter (Pteronura brasiliensis) feeding on fish in river, Pantanal, Brazil Medium repro only (This image may be licensed either as rights managed or royalty free.)
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Franco Banfi / Freshwater fish including Cichlid between water plants and leaves. Cenote Nicte-Ha, near Tulum, Quintana Roo, Yucatan Peninsula, Mexico.
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Franco Banfi / Freshwater fishes including Cichlid between water plants and leaves. Cenote Nicte-Ha, near Tulum, Quintana Roo, Yucatan Peninsula, Mexico.
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Dave Bevan / Male Blackbird (Turdus merula) catching European eel (Anguilla anguilla) elvers as they migrate up a waterfall, Ceredigion, Wales, UK, July.
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Dave Bevan / Male Blackbird (Turdus merula) catching European eel (Anguilla anguilla) elvers as they migrate up a waterfall, Ceredigion, Wales, UK, July.
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Dave Bevan / European eel (Anguilla anguilla) elvers migrating up a wet rock next to a waterfall, Ceredigion, Wales, UK, July.
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Remi Masson / Pike (Esox lucius) hunting in a shoal of Perch (Perca fluviatilis), Lake Neuchatel, Switzerland. June.
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Remi Masson / Large Pike (Esox lucius) more than a meter long, resting on a lake bed, Lake Neuchatel, Switzerland. June.
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Jurgen Freund / Globefish (Diodon nicthemerus) swimming past a mass of plastic moving in the current, North Sulawesi, Indonesia.
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Luke Massey / Giant otter (Pteronura brasiliensis) feeding on a catfish (Loricariidae) with Cocoi heron (Ardea cocoi) scavenging remnants, Rio Cuiaba, Brazil
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Luke Massey / Giant otters (Pteronura brasiliensis) feed on a Golden dorado (Salminus brasiliensis) Pantanal, Brazil.
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Konrad Wothe / Chub (Squalius cephalus) trying to catch a Banded demoiselle (Calopteryx splendens), Bavaria, Germany, June.
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David Fleetham / Great barracuda (Sphyraena barracuda) with three parasitic Copepods at end of upper jaw. Hawaii.
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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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John Waters / Slow motion clip of a Brown trout (Salmo trutta) predating an adult Mayfly (Ephemoptera) struggling to take off from water, River Kennet, Hungerford, Berkshire, England, UK, June.
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Alex Mustard / Giant mottled eel (Anguilla marmorata) in river with villagers washing clothes in background. Ambon, Maluku Archipelago, Indonesia. Banda Sea, tropical west Pacific Ocean.
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Remi Masson / Group of Barbels (Barbus barbus) spawning, River Rhone, Rhone-Alpes, France, April.
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Nick Hawkins / Atlantic salmon (Salmo salar) migrating for spawning in river, Gaspe Peninsula, Quebec, Canada, October.
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Nick Hawkins / Two Atlantic salmon (Salmo salar) silhouetted against sky, Gaspe Peninsula, Quebec, Canada, October.