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Fishes of Idaho

How are your identification skills? Do you know which are native and which were introduced? To see photos and descriptions, and learn more about Idaho fish, check out our Fishes of Idaho online database.

There are around 20,000 species of fish in the world. About 58% of these are marine (saltwater) fish, 41% are freshwater fish, and 1% are both. We have around 100 species in Idaho, and the list keeps growing as more non-native fish are released into Idaho waters. There are only 39 species of fish native to Idaho. The rest were introduced--some by accident, but most on purpose.

Minnows (Cyprinids)

Leatherside chub (Snyderichthys copei)


This small (3 - 5 inch) minnow is native to the Bonneville and upper Snake River basins of UT, ID, and WY, and the Wood River system of ID. Its habitat is pools or riffles in moderate current of cool to cold creeks and rivers. Little is known about the biology of this species. Probably spawns in mid-summer. It may serve as forage for other fishes.

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