There are at least 31 game and 59 non-game fish species known to occur in Montana. Among Montana's fish, three are listed as endangered or threatened species and the Montana Department of Fish, Wildlife and Parks lists a number of species as Species of Concern.
Species are listed by common name, scientific name, typical habitat and occurrence. Common and scientific names from the Montana Field Guide
Order: Salmoniformes, Family: Salmonidae
Native species
Westslope cutthroat trout, Oncorhynchus clarkii lewisi (Salish: Pisɫ)
Yellowstone cutthroat trout, Oncorhynchus clarkii bouvieri
Columbia River redband trout, Oncorhynchus mykiss gairdneri
Bull trout, Salvelinus confluentus (Salish: Aáy or Ɫaʔáy; Kutenai: Tuhuǂ)
Arctic grayling, Thymallus arcticus
Lake trout, Salvelinus namaycush
Mountain whitefish, Prosopium williamsoni (Salish: X̣ʷy̓u)
Pygmy Whitefish, Prosopium coulteri
Lake Whitefish, Coregonus clupeaformis
Non-native, exotic species
Rainbow trout, Oncorhynchus mykiss (Other than the redband subspecies, rainbow trout are an introduced species in Montana)
Brown trout, Salmo trutta
Golden trout, Oncorhynchus mykiss aguabonita
Brook trout, Salvelinus fontinalis
Chinook Salmon, Oncorhynchus tshawytscha
Kokanee Salmon, Oncorhynchus nerka
Cisco, Coregonus artedi
Order: Acipenseriformes, Family: Polyodontidae
Paddlefish, Polyodon spathula
Order: Esociformes, Family: Esocidae
Native species
Northern Pike, Esox lucius
Non-native, exotic species
Tiger Muskellunge, Esox masquinongy x lucius
Order: Perciformes, Family: Centrarchidae
Non-native, exotic species
Black Crappie, Pomoxis nigromaculatus
Largemouth Bass, Micropterus salmoides
Smallmouth Bass, Micropterus dolomieu
White Crappie, Pomoxis annularis
Order: Perciformes, Family: Percidae
Native species
Sauger, Sander canadensis
Yellow Perch, Perca flavescens
Non-native, exotic species
Walleye, Sander vitreus
Order: Siluriformes, Family: Ictaluridae
Native species
Channel Catfish, Ictalurus punctatus
Order: Acipenseriformes, Family: Acipenseridae
Native species
Pallid Sturgeon, Scaphirhynchus albus
Shovelnose Sturgeon, Scaphirhynchus platorynchus
White Sturgeon, Acipenser transmontanus
Order: Gadiformes, Family: Gadidae
Native species
Burbot, Lota lota
Order: Perciformes, Family: Centrarchidae
Non-native, exotic species
Bluegill, Lepomis macrochirus
Green Sunfish, Lepomis cyanellus
Pumpkinseed, Lepomis gibbosus
Rock Bass, Ambloplites rupestris
Order: Perciformes, Family: Percidae
Native species
Iowa Darter, Etheostoma exile
Order: Perciformes, Family: Moronidae
Non-native, exotic species
White Bass, Morone chrysops
Order: Siluriformes, Family: Ictaluridae
Native species
Stonecat, Noturus flavus
Non-native, exotic species
Black Bullhead, Ameiurus melas
Yellow Bullhead, Ameiurus natalis
Order: Perciformes, Family: Sciaenidae
Native species
Freshwater Drum, Aplodinotus grunniens
Order: Salmoniformes, Family: Osmeridae
Non native, exotic species
Rainbow Smelt, Osmerus mordax
Order: Lepisosteiformes. Family: Lepisosteidae
Native species
Shortnose Gar, Lepisosteus platostomus
Order: Hiodontiformes, Family: Hiodontidae
Native species
Goldeye, Hiodon alosoides
Order: Cyprinodontiformes, Family: Poeciliidae
Non-native, exotic species
Green Swordtail, Xiphophorus helleri
Sailfin Molly, Poecilia latipinna
Shortfin Molly, Poecilia mexicana
Variable Platyfish, Xiphophorus variatus
Western Mosquitofish, Gambusia affinis
Order: Cyprinodontiformes, Family: Fundulidae
Non-Native, exotic species
Northern Plains Killifish, Fundulus kansae
Banded Killifish, "Fundulus diaphanus"
Order: Cypriniformes, Family: Cyprinidae
Native species
Brassy Minnow, Hybognathus hankinsoni
Emerald Shiner, Notropis atherinoides
Fathead Minnow, Pimephales promelas
Flathead Chub, Platygobio gracilis
Golden Shiner, Notemigonus crysoleucas
Longnose Dace, Rhinichthys cataractae
Northern Pikeminnow, Ptychocheilus oregonensis (Salish: Qʷq̓é)
Northern Redbelly Dace, Phoxinus eos
Northern Redbelly X Finescale Dace, Phoxinus eos x phoxinus neogaeus
Peamouth, Mylocheilus caurinus
Pearl Dace, Margariscus margarita
Plains Minnow, Hybognathus placitus
Redside Shiner, Richardsonius balteatus
Sand Shiner, Notropis stramineus
Sicklefin Chub, Macrhybopsis meeki
Western Silvery Minnow, Hybognathus argyritis
Sturgeon Chub, Macrhybopsis gelida
Lake Chub, Couesius plumbeus
Creek Chub, Semotilus atromaculatus
Non-native, exotic species
Goldfish, Carassius auratus
Common Carp, Cyprinus carpio
Spottail Shiner, Notropis hudsonius
Utah Chub, Gila atraria
Order: Cypriniformes, Family: Catostomidae
Native species
Bigmouth Buffalo, Ictiobus cyprinellus
Blue Sucker, Cycleptus elongatus
Largescale Sucker, Catostomus macrocheilus
Longnose Sucker, Catostomus catostomus
Mountain Sucker, Catostomus platyrhynchus
River CarpSucker, Carpiodes carpio
Shorthead Redhorse, Moxostoma macrolepidotum
Smallmouth Buffalo, Ictiobus bubalus
White Sucker, Catostomus commersoni
Order: Esociformes, Family: Umbridae
Non-native, exotic species
Central mudminnow, Umbra limi
Order: Scorpaeniformes, Family: Cottidae
Native species
Deepwater Sculpin, Myoxocephalus thompsonii
Mottled Sculpin, Cottus bairdi
Slimy Sculpin, Cottus cognatus
Spoonhead Sculpin, Cottus ricei
Torrent Sculpin, Cottus rhotheus
Order: Gasterosteiformes, Family: Gasterosteidae
Native species
Brook Stickleback, Culaea inconstans
Order: Percopsiformes, Family: Percopsidae
Native species
Trout-perch, Percopsis omiscomaycus
