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Open Image ModalCoral reef scenery with Golden butterflyfish (Chaetodon semilarvatus) and Red Sea bannerfish (Heniochus intermedius). Egypt, Red Sea. (credit:Georgette Douwma via Getty Images)
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Open Image ModalSchool of mackerel (credit:Johner Images via Getty Images)
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Open Image ModalRiver Trout, Salmo Trutta fario, Verzasca River, Switzerland (credit:Mirko Zanni via Getty Images)
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Open Image ModalUnited States, Alaska, Katmai national park, Brooks river, sockeye salmon (credit:DENIS-HUOT Michel / hemis.fr via Getty Images)
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Open Image ModalSimilan Islands coral reefs, Phuket, Thailand (credit:tunart via Getty Images)
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Open Image ModalAndaman Sea, Thailand (credit:Georgette Douwma via Getty Images)
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Open Image ModalRedtail catfish (Cephalus hemilopterus). (credit:TOM MCHUGH via Getty Images)
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Open Image Modal(Digital composite) (credit:Pete Turner via Getty Images)
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Open Image ModalFish in the clear water of the Caribbean, Rosario Islands, Caribbean, Colombia (credit:Ecaterina Leonte via Getty Images)
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Open Image ModalFly Fishing, Environmental Conservation, Trout, River (credit:Pat Clayton via Getty Images)
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Open Image ModalYellow perch, (Perca flavescens), depicted in a natural setting following a spoon type lure (credit:John Kuczala via Getty Images)
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Open Image ModalPapua, New Guinea (credit:Jeff Rotman via Getty Images)
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Open Image ModalMozambique, Indian Ocean, school of crescent-tail bigeyes (Priacanthus hamrur) (credit:moodboard via Getty Images)
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Open Image ModalShark and other fishes under sea. (credit:Jacob D. Moore via Getty Images)
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Open Image ModalLyretail anthias or goldies (Pseudanthias squamipinnis) on reef top. Egypt, Red Sea. (credit:Georgette Douwma via Getty Images)
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Open Image ModalMalpelo is a small island in the East Pacific Ocean, located about 500 km west of the Colombian mainland. The UNESCO declared Malpelo as a world heritage site. (credit:Jens Kuhfs via Getty Images)
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Open Image ModalLake trout, Salvelinus namaycush (credit:Picavet via Getty Images)
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Open Image ModalGolden butterflyfish [Chaetodon semilarvatus] swimming over coal reef. Egypt, Red Sea. (credit:Georgette Douwma via Getty Images)
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Open Image ModalShoal of fish under water with rays of sunlight (credit:John Foxx via Getty Images)
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Open Image ModalSalmon swimming in the Puget Sound in Seattle. (credit:Tom Turley/t-squared graphic design via Getty Images)
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Open Image ModalThe Adams River sockeye run is one of the largest and most famous in the world. It happens once every four years. (credit:Darryl Leniuk via Getty Images)
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Open Image ModalSockeye Salmon, Lake Iliamna, Bristol Bay, Alaska Fly Fishing, Environmental Conservation, Trout, River (credit:Pat Clayton via Getty Images)
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Open Image Modalkeramasyotou island (credit:Top Photo Corporation via Getty Images)
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Open Image ModalA spawning Trout trying to jump a dam on the Humber River, in downtown Toronto (credit:Jon Hurd via Getty Images)
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Open Image ModalUnderwater photo of The Catfish (Silurus Glanis). (credit:Vladimír Vítek via Getty Images)
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Open Image ModalGroup of Salmon jumping upstream in river (credit:moodboard via Getty Images)