Anup Shah / African fish eagle {Haliaeetus vocifer} defends Lesser flamingo carcass from Marabou storks {Leptoptilos crumeniferus}, Lake Nakuru, Kenya.

Anup Shah / African fish eagle {Haliaeetus vocifer} fighting Marabou storks {Leptoptilos crumeniferus} over Lesser flamingo carcass, Lake Nakuru, Kenya.

Kerstin Hinze / Male Common european toad (Bufo bufo) in amplexus with a dead fish, Lower Saxony, Germany, April.

Remi Masson / Pike (Esox lucius) hunting in a shoal of Perch (Perca fluviatilis), Lake Neuchatel, Switzerland. June.

Remi Masson / Large Pike (Esox lucius) more than a meter long, resting on a lake bed, Lake Neuchatel, Switzerland. June.

Sean Crane / Grizzly Bear (Ursus arctos horribilis) with Coho Salmon (Oncorhynchus kisutch) prey, Lake Clark National Park, Alaska

Danny Green / Grizzly Bear (Ursus arctos) eating a fish, Lake Clarke National Park, Alaska, August

Andy Rouse / Slow motion clip of a Common kingfisher (Alcedo atthis) catching a fish, Scotland, UK, January.

Nick Upton / Little egret (Egretta garzetta) struggling to swallow a large Pike (Esox lucius) it has just caught, Rutland Water, Rutland, England, UK, November.

Ingo Arndt / Grizzly bear (Ursus arctos horribilis) mother with two cubs catching salmon, Lake Clark National Park, Alaska, USA, September

Danny Green / Coastal brown bear (Ursus arctos) eating a fish, Lake Clarke National Park, Alaska, September

Bence Mate / Juvenile White tailed sea eagles (Haliaeetus albicilla) fighting for fish in mid air, Lake Csaj, Kiskunsagi National Park, Hungary. February.

Bence Mate / Herring gull (Larus argentatus) mobbing White tailed sea eagle (Haliaeetus albicilla) with fish prey, Lake Csaj, Kiskunsagi National Park, Hungary. March.

Bence Mate / White tailed eagle (Haliaeetus albicilla) with fish in beak , Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / Gull mobbing White tailed sea eagle (Haliaeetus albicilla) with fish prey, Lake Csaj, Kiskunsagi National Park, Hungary. March.

Bence Mate / White tailed eagle (Haliaeetus albicilla) juvenile feeding on fish, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.

Bence Mate / Great egret (Ardea alba) with fish prey, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / Grey herons (Ardea cinerea) squabbling for fish in flight, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / Cormorant (Phalacrocorax carbo) with fish prey, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. March.

Bence Mate / Grey heron (Ardea cinerea) close up with large fish in beak, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.

Bence Mate / Cormorant (Phalacrocorax carbo) and Great egret (Ardea alba) fighting over fish, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary, January.

Bence Mate / Grey heron (Ardea cinerea) close up with fish in beak, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary, February.

Bence Mate / European otter (Lutra lutra) with fish prey, with water splashing around, Kiskunsagi National Park, Hungary, July.

Bence Mate / Grey Heron (Ardea cinerea) with large carp fish in beak, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.

Bence Mate / European otter (Lutra lutra) feeding on fish, Kiskunsagi National Park, Hungary, January.

Bence Mate / Great egret (Ardea alba) fighting with Cormorant (Phalacrocorax carbo) over fish, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary.

Bence Mate / White tailed eagle (Haliaeetus albicilla) juvenile feeding on fish, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.

Bence Mate / Bittern (Botaurus stellaris) with fish prey, with head feathers raised, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary.

Bence Mate / Two European otters (Lutra lutra) one shaking off water and the other feeding on fish, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. October.

Bence Mate / Cormorants (Phalacrocorax carbo) squabbling over fish, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / Grey heron (Ardea cinerea) with fish prey, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. May.

Michel Poinsignon / Grey heron (Ardea cinerea) catching fish in lake, Pusztaszer, Hungary, April

Michel Poinsignon / Grey heron (Ardea cinerea) catching fish in lake, Pusztaszer, Hungary, April

Michel Poinsignon / Great white egret (Egretta alba) catching fish in lake, Pusztaszer, Hungary, April

Michel Poinsignon / Grey heron (Ardea cinerea) catching fish in lake, Pusztaszer, Hungary, April

Bence Mate / Great egrets (Ardea alba) and Grey heron (Ardea cinerea) squabbling over fish, with some in flight. Blurred motion photograph, Lake Csaj, Pusztaszer, Hungary. February.

Bence Mate / Grey heron (Ardea cinerea) and Great egret (Ardea alba) fighting over fish, Lake Csaj, Pusztaszer, Hungary, December. Winner of the Portfolio category of the Terre Sauvage Nature Images Awards competi...

Bence Mate / Great egret (Ardea alba) hunting fish, Lake Csaj, Pusztaszer, Hungary, February. Winner of the Portfolio category of the Terre Sauvage Nature Images Awards competition 2015.

Franco Banfi / Freshwater jellyfish (Craspedacusta sowerbii) Lake Lugano, Ticino, Switzerland. August. Invasive species.

Franco Banfi / Freshwater jellyfish (Craspedacusta sowerbii) Lake Lugano, Ticino, Switzerland. August. Invasive species.

David Pattyn / Dalmatian pelicans (Pelecanus crispus) fighting for fish. Lake Kerkini, Greece. February. Vulnerable species.

David Pattyn / Great crested grebe (Podiceps cristatus) adult with a small fish on a misty morning. The Netherlands.May 2014

David Pattyn / Great crested grebe (Podiceps cristatus) with fish to feed one of its chicks. The Netherlands. June 2014

Bence Mate / Great egret (Ardea alba) and Grey heron (Ardea cinerea) fighting over a fish, Lake Csaj, Kiskunsagi National Park, Hungary

Markus Varesvuo / Osprey (Pandion haliaetus) hitting the surface of the lake, whilst hunting for fish, Kangasala, Finland, Scandinavia, April. Magic Moments book plate.

Eric Baccega / African fish eagle (Haliaeetus vocifer) fishing, Baringo lake, Kenya, Africa.

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

Loic Poidevin,Loic Poidevin / Dalmatian pelicans (Pelecanus crispus) squabbling over fish, Lake Kerkini, Greece, February

Laurent Geslin / Bream (Abramis brama) pair courting, Lake Geneva, Geneva, Switzerland

Bence Mate / Close up of Grey Heron (Ardea cinerea) with bighead carp (Hypophthalmichthys nobilis) in bill, Lake Csaj, Kiskunsagi National Park, Hungary

Bence Mate / Great white egret (Ardea alba) catching fish, Lake Csaj, Kiskunsagi National Park, Hungary

Bence Mate / Great egret (Ardea alba) and Grey heron (Ardea cinerea) fighting over a fish, Lake Csaj, Kiskunsagi National Park, Hungary

Bence Mate / Great egret (Ardea alba) and Grey heron (Ardea cinerea) fighting over a fish, Lake Csaj, Kiskunsagi National Park, Hungary

Juergen Freund / Halligan Bay, where land meets water of the salt field and thousands of dead bugs, fish, rodents and birds are washed ashore. Lake Eyre, South Australia

Michel Roggo / Grayling (Thymallus thymallus) on spawning ground. Lac de Fenetre, alpine lake, 2456 m above sea level, Canton of Valais, Switzerland, June.

Michel Roggo / Grayling (Thymallus thymallus) on spawning ground. Lac de Fenetre, alpine lake, 2456 m above sea level, Canton of Valais, Switzerland, June.

David Pattyn / Little Egret (Egretta garzetta) in a hunting posture while stalking to catch small fish, La Dombes lake area, France, June

David Pattyn / Purple heron (Ardea purpurea) catching fish on a misty morning, La Dombes lake area, France, June

Alex Mustard / 2020VISION / Brown trout (Salmo trutta) swimming through sun beams in a freshwater lake, Capernwray Quarry, Lancashire, UK, July

Steven David Miller / Australian freshwater / Johnstone's crocodile (Crocodylus johnsoni) with fish in mouth, a scrap from a fisherman, Lake Kununurra, Western Australia, July

Juan Carlos Munoz / Common carp (Cyprinus carpio) in lake, Plitvice Lakes National Park, Lika, Croatia, Europe, October 2011

Linda Pitkin / 2020VISION / Arctic charr (Salvelinus alpinus) males showing breeding colours, in a river where they have come to spawn, Ennerdale Valley, Lake District NP, Cumbria, England, UK, November 2011. 2020VISION Exhibiti...

Linda Pitkin / 2020VISION / Arctic charr (Salvelinus alpinus) female with males showing breeding colours, in spawning river, Ennerdale Valley, Lake District NP, Cumbria, England, UK, November 2011

Linda Pitkin / 2020VISION / Arctic charr (Salvelinus alpinus) males showing breeding colours, in spawning river, Ennerdale Valley, Lake District NP, Cumbria, England, UK, November 2011

Linda Pitkin / 2020VISION / Brown trout (Salmo trutta), Ennerdale Valley, Lake District NP, Cumbria, England, UK, November 2011. Did you know? Trout scales have growth rings which you can read in the same way tree rings.

Christophe Courteau / Whale headed / Shoebill stork (Balaeniceps rex) catching a Lungfish (Protoperus sp) in the swamps of Mabamba, Lake Victoria, Uganda / Bec en sabot, dipneuste, Lac Victoria, Ouganda

Alex Mustard / 2020VISION / Silhouette of Brown trout (Salmo trutta) in freshwater lake, Capernwray, Lancashire, UK, July

Bence Mate / Great egret (Ardea alba) drops a fish from its beak and a Black headed gull (Larus ridibundus) flies in to catch it. Lake Csaj, Kiskunsagi NP, Hungary, January. Winner, Eric Hosking award, 2011 Wildli...

Bence Mate / Great reed warbler (Acrocephalus arundinaceus) taking fish from water, Hungary, June. Winner, Eric Hosking award, 2011 Wildlife Photographer of the Year competition

Christian Ziegler / Greater Bulldog Bat (Noctilio leporinus) sequence catching a fish from Lake Gatun, Smithsonian Tropical Research Station, Barro Colorado Island, Panama

Sergey Gorshkov / Salmon (Salmonidae) eggs falling to lake bottom, Lake Kuril, Kamchatka, Far East Russia, July

Sergey Gorshkov / Sockeye Salmon (Salmonidae) spawning in Lake Kuril, Kamchatka, Far East Russia, August

Sergey Gorshkov / Salmon (Salmonidae) fry with egg case still attached, Lake Kuril, Kamchatka, Far East Russia, January

Sergey Gorshkov / Sockeye salmon (Oncorhynchus nerka) spawning, Lake Kuril, Kamchatka, Far East Russia, July

Sergey Gorshkov / Migrating Salmon (Salmonidae) Lake Kuril, Kamchatka, Far East Russia, August

Sergey Gorshkov / Salmon (Salmonidae) migrating to spawn in Lake Kuril, Kamchatka, Far East Russia, August

Sergey Gorshkov / Salmon (Salmonidae) migrating to spawn in Lake Kuril, Kamchatka, Far East Russia, August

Floris van Breugel / Kokanee Salmon (Oncorhynchus nerka) on Autumn migration up Taylor Creek from Lake Tahoe, California, USA.

Marie Read / Osprey (Pandion haliaetus) taking flight from tufa tower carrying a fish, Mono Lake, California, USA

Michel Roggo / Underwater landscape in mountain lake with Rainbow trout, Berner Oberland, Swiss Alps, Switzerland, March

Michel Roggo / Lake trout (Salmo trutta lacustris) morph of the Brown Trout, Europe

Michel Roggo / Sockeye / Red Salmon (Oncorhynchus nerka) waiting in lake to enter the Adams river for migration upstream, British Columbia, Canada 2006

Michel Roggo / Lake trout (Salmo trutta lacustris) morph of Brown Trout, jumping up waterfall on migration to spawning ground, Lac de Neuchtel, Switzerland 2006

Michel Roggo / Roach (Rutilus rutilus) spawning behavior, tributary of the Lake of Seedorf, Fribourg, Switzerland 2006

Michel Roggo / Chubb (Leuciscus cephalus) waiting for food at outlet of lake, Croatia, 2005

Michel Roggo / Roach (Rutilus rutilus) spawning behavior in tributary of the Lake of Seedorf, Fribourg, Switzerland 2006

Michel Roggo / Roach (Rutilus rutilus) spawning behavior, tributary of the Lake of Seedorf, Fribourg, Switzerland 2006

Michel Roggo / European Grayling (Thymallus thymallus), Males at spawning ground, Lake of Thoune, Switzerland, 1992

Michel Roggo / European Graylings (Thymallus thymallus) spawning, male in foreground, Lake of Thoune, Switzerland, 1992

Laurent Geslin / Fisherman handling fresh catch, and gulls flying overhead, on lake of Geneva, Switzerland, May 2007.

Laurent Geslin / Arctic charr (Salvelinus alpinus) eggs, collected from Lake of Geneva, France, December 2007.

Wild Wonders of Europe / Lundgre / Diver close to tectonic boundary between the Eurasian and the North American plates, Silfra, Thingvellir lake, Thingvellir National Park, Iceland, May 2009.

Inaki Relanzon / Madagascar fish-eagle (Haliaeetus vociferoides), taking off from water after failed attempt to catch fish, Ravilobe Lake, Ankarafantsika National Park, Madagascar.

Wild Wonders of Europe / Ziegler / Dice snake (Natrix tesselata) hunting for small fish and tadpoles in a lake, Patras area, The Peloponnese, Greece, May 2009

Wild Wonders of Europe / Ziegler / Dice snake (Natrix tesselata) swimming while hunting for little fish and tadpoles in a lake, Patras area, The Peloponnese, Greece, May 2009

Wild Wonders of Europe / Ziegler / Dice snake (Natrix tesselata) hunting for small fish and tadpoles in a lake, Patras area, The Peloponnese, Greece, May 2009