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 Killifish Order: Cyprinodontiformes, Family: Fundulidae Non-Native, exotic species Northern Plains killifish, Fundulus kansae Banded killifish, "Fundulus diaphanus" Minnows 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 Peamouth, Mylocheilus caurinus Allegheny pearl dace, Margariscus margarita Northern pearl dace, Margariscus nachtriebi 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 Suckers 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 Mudminnows Order: Esociformes, Family: Umbridae Non-native, exotic species Central mudminnow, Umbra limi Sculpins 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 Sticklebacks Order: Gasterosteiformes, Family: Gasterosteidae Native species Brook stickleback, Culaea inconstans Trout-perch Order: Percopsiformes, Family: Percopsidae Native species Trout-perch, Percopsis omiscomaycus See also List of amphibians and reptiles of Montana Birds of Montana List of non-marine molluscs of Montana Fishes of Yellowstone National Park Further reading Notes Fish Montana .Montana .Montana Fish