This is a list of freshwater fish living wild in the US state of Maryland.

Bowfin ( Amiidae)

• Bowfin ( Amia calva)

Catfishes ( Ictaluridae)

• White catfish ( Ameiurus catus)
• Yellow bullhead ( Ameiurus natalis)
• Brown bullhead ( Ameiurus nebulosus)
• Blue catfish ( Ictalurus furcatus)
• Channel catfish ( Ictalurus punctatus)
• Stonecat ( Noturus flavus)
• Tadpole madtom ( Noturus gyrinus)
• Margined madtom ( Noturus insignis)
• Flathead catfish ( Pylodictis olivaris)

Eels ( Anguillidae)

• American eel ( Anguilla rostrata)

Gars ( Lepisosteidae)

• Longnose gar ( Lepisosteus osseus)

Herrings ( Clupeidae)

• Blueback herring ( Alosa aestivalis)
• Hickory shad ( Alosa mediocris)
• Alewife ( Alosa pseudoharengus)
• American shad ( Alosa sapidissima)
• Gizzard shad ( Dorosoma cepedianum)
• Threadfin shad ( Dorosoma petenense)

Killifishes ( Fundulidae)

• Banded killifish ( Fundulus diaphanus)
• Mummichog ( Fundulus heteroclitus)
• Spotfin killifish ( Fundulus luciae)
• Striped killifish ( Fundulus majalis)
• Rainwater killifish ( Lucania parva)

Lampreys ( Petromyzontidae)

• Least brook lamprey ( Lampetra aepyptera)
• American brook lamprey ( Lampetra appendix)
• Sea lamprey ( Petromyzon marinus)

Lotids ( Lotidae)

• Burbot ( Lota lota)

Minnows ( Cyprinidae)

• Central stoneroller ( Campostoma anomalum)
• Goldfish ( Carassius auratus) (introduced)
• Koi ( Cyprinus rubrofuscus) (introduced)
• Redside dace ( Clinostomus elongatus)
• Rosyside dace ( Clinostomus funduloides)
• Grass carp ( Ctenopharyngodon idella)
• Satinfin shiner ( Cyprinella analostana)
• Spotfin shiner ( Cyprinella spiloptera)
• Common carp ( Cyprinus carpio)
• Cutlips minnow ( Exoglossum maxillingua)
• Eastern silvery minnow ( Hybognathus regius)
• Striped shiner ( Luxilus chrysocephalus)
• Common shiner ( Luxilus cornutus)
• Allegheny pearl dace ( Margariscus margarita)
• River chub ( Nocomis micropogon)
• Golden shiner ( Notemigonus crysoleucas)
• Comely shiner ( Notropis amoenus)
• Emerald shiner ( Notropis atherinoides)
• Bridle shiner ( Notropis bifrenatus)
• Silverjaw minnow ( Notropis buccatus)
• Ironcolor shiner ( Notropis chalybaeus)
• Spottail shiner ( Notropis hudsonius)
• Swallowtail shiner ( Notropis procne)
• Rosyface shiner ( Notropis rubellus)
• Cheat minnow ( Pararhinichthys bowersi)
• Bluntnose minnow ( Pimephales notatus)
• Fathead minnow ( Pimephales promelas)
• Eastern blacknose dace ( Rhinichthys atratulus)
• Longnose dace ( Rhinichthys cataractae)
• Common rudd ( Scardinius erythropthalmus) (introduced)
• Creek chub ( Semotilus atromaculatus)
• Fallfish ( Semotilus corporalis)
• Tench ( Tinca tinca) (introduced)

Mudminnows ( Umbridae)

• Eastern mudminnow ( Umbra pygmaea)

Perches ( Percidae)

• Greenside darter ( Etheostoma blennioides)
• Rainbow darter ( Etheostoma caeruleum)
• Fantail darter ( Etheostoma flabellare)
• Swamp darter ( Etheostoma fusiforme)
• Johnny darter ( Etheostoma nigrum)
• Tessellated darter ( Etheostoma olmstedi)
• Maryland darter ( Etheostoma sellare)
• Glassy darter ( Etheostoma vitreum)
• Banded darter ( Etheostoma zonale)
• Yellow perch ( Perca flavescens)
• Common logperch ( Percina caprodes)
• Stripeback darter ( Percina notogramma)
• Shield darter ( Percina peltata)
• Walleye ( Sander vitreum) (introduced)

Percopsids ( Percopsidae)

• Trout-perch ( Percopsis omiscomaycus)

Pikes ( Esocidae)

• Redfin pickerel ( Esox americanus)
• Northern pike ( Esox lucius)
• Muskellunge ( Esox masquinongy)
• Tiger muskellunge (Esox masquinongy X Esox lucius)
• Chain pickerel ( Esox niger)

Pirate perch ( Aphredoderidae)

• Pirate perch ( Aphredoderus sayanus)

Poeciliids ( Poeciliidae)

• Eastern mosquitofish ( Gambusia holbrooki)

Pupfish ( Cyprinodontidae)

• Sheepshead minnow ( Cyprinodon variegatus)

Sculpins ( Cottidae)

• Mottled sculpin ( Cottus bairdii)
• Blue Ridge sculpin ( Cottus caeruleomentum)

Silversides ( Atherinopsidae)

• Rough silverside ( Membras martinica)
• Inland silverside ( Menidia beryllina)
• Atlantic silverside ( Menidia menidia)

Smelts ( Osmeridae)

• Rainbow smelt ( Osmerus mordax)

Snakeheads ( Channidae)

• Northern snakehead (introduced)

Sticklebacks ( Gasterosteidae)

• Fourspine stickleback ( Apeltes quadracus)
• Brook stickleback ( Culaea inconstans)
• Threespine stickleback ( Gasterosteus aculeatus)

Sturgeons ( Acipenseridae)

• Shortnose sturgeon ( Acipenser brevirostrum)
• Atlantic sturgeon ( Acipenser oxyrhinchus)

Suckers ( Catostomidae)

• Quillback ( Carpiodes cyprinus)
• Longnose sucker ( Catostomus catostomus)
• White sucker ( Catostomus commersoni)
• Creek chubsucker ( Erimyzon oblongus)
• Northern hogsucker ( Hypentelium nigricans)
• Golden redhorse ( Moxostoma erythrurum)
• Shorthead redhorse ( Moxostoma macrolepidotum)

Sunfishes ( Centrarchidae)

• Mud sunfish ( Acantharcus pomotis)
• Rock bass ( Amblopites rupestris)
• Flier ( Centrarchus macropterus)
• Blackbanded sunfish ( Enneacanthus chaetodon)
• Bluespotted sunfish ( Enneacanthus gloriosus)
• Banded sunfish ( Enneacanthus obesus)
• Redbreast sunfish ( Lepomis auritus)
• Green sunfish ( Lepomis cyanellus)
• Pumpkinseed ( Lepomis gibbosus)
• Pumpkingill (Lepomis gibbosus x macrochirus)
• Warmouth ( Lepomis gulosus)
• Bluegill ( Lepomis macrochirus)
• Greengill sunfish (Lepomis macrochirus x cyanellus)
• Longear sunfish ( Lepomis megalotis)
• Redear sunfish ( Lepomis microlophus)
• Smallmouth bass ( Micropterus dolomieu)
• Largemouth bass ( Micropterus salmoides)
• White crappie ( Pomoxis annularis)
• Black crappie ( Pomoxis nigromaculatus)

Temperate basses ( Moronidae)

• White perch ( Morone americana)
• Striped bass ( Morone saxatilis)

Trout and whitefish ( Salmonidae)

• Cutthroat trout (Oncorhynchus clarki)
• Rainbow trout (Oncorhynchus mykiss)
• Brown trout (Salmo trutta)
• Brook trout (Salvelinus fontinalis)
• Lake trout (Salvelinus namaycush)
• Lake herring (Coregonus artedi)

References

• Dnr.state.md: Fish key of native species