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Rainbow Trout

Photo: Rainbow trout
Rainbow trout inhabit the cool freshwater habitats of western North America. Individuals who migrate to the sea lose their distinctive pink streak for a silver look.
Photograph by Ken Hammond, USDA

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Fish Features

Photo: Sockeye salmon

Kamchatka Salmon

Russia’s remote Kamchatka Peninsula has some of the richest salmon runs in the Pacific, sustaining animals and communities. Now the fish need help.

Photo: American bullfrog

Wild Rivers

Visit the rivers and streams of the southeastern U.S., home to some of the most species-rich freshwater systems on Earth, in this Wild World feature.

Photo: Greenland shark

Photo of the Day: Cold Fish

Get a rare glimpse of the elusive Greenland shark, largest of all Arctic fish.

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