This is a list of fishes that inhabit Isle Royale National Park. If the name is in bold it is a non-native species.
Acipenseridae Lake sturgeon, Acipenser fulvescens
Catostomidae Longnose sucker, Catostomus catostomus White sucker, Catostomus commersoni Shorthead redhorse, Moxostoma macrolepidotum
Centrarchidae Rock bass, Ambloplites rupestris Pumpkinseed, Lepomis gibbosus Smallmouth bass, Micropterus dolomieu Black crappie, Pomoxis nigromaculatus
Clupeidae Alewife, Alosa pseudoharengus
Cottidae Fourhorn sculpin, Myoxocephalus quadricornis Mottled sculpin, Cottus bairdii Slimy sculpin, Cottus cognatus Spoonhead sculpin, Cottus ricei
Cyprinidae Lake chub, Couesius plumbeus Brassy minnow, Hybognathus hankinsoni Allegheny pearl dace, Margariscus margarita Golden shiner, Notemigonus crysoleucas Emerald shiner, Notropis atherinoides Common shiner, Notropis cornutus Blackchin shiner, Notropis heterodon Blacknose shiner, Notropis heterolepis Northern blacknose shiner, Notropis heterolepis heterolepis Blacknose shiner, Notropis heterolepis regalis Spottail shiner, Notropis hudsonius Mimic shiner, Notropis volucellus Northern redbelly dace, Phoxinus eos Finescale dace, Phoxinus neogaeus Blacknose dace, Rhinichthys atratulus Longnose dace, Rhinichthys cataractae Eastern blacknose dace, Rhinichthys obtusus Creek chub, Semotilus atromaculatus Semotilus margarita Harvey lake pearl dace, Semotilus margarita koelzi Minnesota pearl dace, Semotilus margarita nachtriebi Fathead minnow, Pimephales promelas Harvey lake fathead minnow, Pimephales promelas harveyensis Fathead minnow, Pimephales promelas promelas
Esocidae Northern pike, Esox lucius Muskellunge, Esox masquinongy
Gasterosteidae Brook stickleback, Culaea inconstans Ninespine stickleback, Pungitius pungitius
Lotidae Burbot, Lota lota
Osmeridae Rainbow smelt, Osmerus mordax
Percidae Iowa darter, Etheostoma exile Johnny darter, Etheostoma nigrum Ruffe, Gymnocephalus cernuus Logperch, Percina caprodes Yellow perch, Perca flavescens Sauger, Sander canadense Walleye, Sander vitreum
Percopsidae Trout-perch, Percopsis omiscomaycus
Petromyzontidae Northern brook lamprey, Ichthyomyzon fossor Silver lamprey, Ichthyomyzon unicuspis Sea lamprey, Petromyzon marinus
Salmonidae Cisco, Coregonus artedi Lake herring, Coregonus artedi arcturus Lake herring, Coregonus artedi sargenti Siskiwit lake cisco, Coregonus bartlettii Lake whitefish, Coregonus clupeaformis Great lakes whitefish, Coregonus clupeaformis clupeaformis Lake desor whitefish, Coregonus clupeaformis dustini Inland lakes whitefish, Coregonus clupeaformis neohantoniensis Big-eyed chub, Coregonus kiyi Blackfin cisco, Coregonus nigripinnis Shortnose cisco, Coregonus reighardi Shortjaw cisco, Coregonus zenithicus Pink salmon, Oncorhynchus gorbuscha Coho salmon, Oncorhynchus kisutch Rainbow trout, Oncorhynchus mykiss Chinook salmon, Oncorhynchus tshawytscha Pygmy whitefish, Prosopium coulterii Round whitefish, Prosopium cylindraceum Salmo oxyrinchus Atlantic salmon, Salmo salar Brown trout, Salmo trutta Brook trout, Salvelinus fontinalis Lake trout, Salvelinus namaycush Lake trout, Salvelinus namaycush namaycush Siscowet, Salvelinus namaycush siscowet
References