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Westslope Cutthroat Trout
Oncorhynchus lewisi
237 observations
Rainbow Trout
Oncorhynchus mykiss
194 observations
Brown Trout
Salmo trutta
173 observations
Brook Trout
Salvelinus fontinalis
141 observations
Mountain Whitefish
Prosopium williamsoni
77 observations
Largemouth Bass
Micropterus nigricans
73 observations
Longnose Dace
Rhinichthys cataractae
70 observations
Northern Pikeminnow
Ptychocheilus oregonensis
66 observations
Rocky Mountain Cutthroat Trout
Oncorhynchus virginalis
66 observations
Yellow Perch
Perca flavescens
63 observations
Pumpkinseed
Lepomis gibbosus
60 observations
Redside Shiner
Richardsonius balteatus
59 observations
European Carp
Cyprinus carpio
49 observations
Smallmouth Bass
Micropterus dolomieu
48 observations
Northern Pike
Esox lucius
47 observations
Arctic Grayling
Thymallus arcticus
34 observations
Bull Trout
Salvelinus confluentus
29 observations
Longnose Sucker
Catostomus catostomus
28 observations
Lake Trout
Salvelinus namaycush
28 observations
White Sucker
Catostomus commersonii
27 observations
Goldeye
Hiodon alosoides
26 observations
Flathead Chub
Platygobio gracilis
23 observations
Bluegill
Lepomis macrochirus
22 observations
Largescale Sucker
Catostomus macrocheilus
21 observations
Fathead Minnow
Pimephales promelas
21 observations
Channel Catfish
Ictalurus punctatus
19 observations
Green Sunfish
Lepomis cyanellus
18 observations
Stonecat
Noturus flavus
18 observations
Green Swordtail
Xiphophorus hellerii
16 observations
Black Bullhead
Ameiurus melas
15 observations
Sockeye Salmon
Oncorhynchus nerka
14 observations
Invasive
Variable Platyfish
Xiphophorus variatus
13 observations
Cedar Sculpin
Cottus schitsuumsh
12 observations
Western Mosquitofish
Gambusia affinis
11 observations
Lake Chub
Couesius plumbeus
11 observations
Brook Stickleback
Culaea inconstans
10 observations
Westslope Cutbow
Oncorhynchus mykiss × lewisi
10 observations
Plains Sucker
Pantosteus jordani
9 observations
Walleye
Sander vitreus
8 observations
Lake Whitefish
Coregonus clupeaformis
8 observations
Burbot
Lota lota
8 observations
Mottled Sculpin
Cottus bairdii
7 observations
Shorthead Redhorse
Moxostoma macrolepidotum
7 observations
Plains Sand Shiner
Miniellus missuriensis
7 observations
American Paddlefish
Polyodon spathula
6 observations
Creek Chub
Semotilus atromaculatus
6 observations
Sauger
Sander canadensis
5 observations
Black Crappie
Pomoxis nigromaculatus
5 observations
Freshwater Drum
Aplodinotus grunniens
5 observations
Invasive
Golden Trout
Oncorhynchus aguabonita
5 observations
Frequently Asked Questions
- The 10 most common fish in Montana are:
- Westslope Cutthroat Trout (Oncorhynchus lewisi)
- Rainbow Trout (Oncorhynchus mykiss)
- Brown Trout (Salmo trutta)
- Brook Trout (Salvelinus fontinalis)
- Mountain Whitefish (Prosopium williamsoni)
- Largemouth Bass (Micropterus nigricans)
- Longnose Dace (Rhinichthys cataractae)
- Northern Pikeminnow (Ptychocheilus oregonensis)
- Rocky Mountain Cutthroat Trout (Oncorhynchus virginalis)
- Yellow Perch (Perca flavescens)
- The most observed fish in Montana is Westslope Cutthroat Trout (Oncorhynchus lewisi), with 237 recorded observations.
- Some of the most commonly observed invasive fish in Montana include:
- Variable Platyfish (Xiphophorus variatus)
- Golden Trout (Oncorhynchus aguabonita)