Idaho AFS Logo

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.

Sunfishes (Centrarchids)

Pumpkinseed (Lepomis gibbosus)


Pumpkinseed sunfish are native to the waters of eastern North America, but they have been widely introduced across the US and Canada. The maximum size of these sunfish appears to be about 10 inches, with most being considerably smaller. Pumpkinseeds are usually found in small lakes and ponds, or in shallow weedy bays of larger lakes. Spawning usually takes place in late spring or early summer in shallow near shore areas. Although these fish are usually relatively small, their aggressive nature makes them an excellent ?beginner fish? for young anglers.

Click thumbnails to enlarge