HomeFish encyclopediaRay-finned fishesPerch-like fishPerchesMaryland darter Maryland darter (Etheostoma sellare) Scientific name: Etheostoma sellare Radcliffe & Welsh, 1913 The Maryland darter (Etheostoma sellare) is a freshwater fish of the family Percidae. Native range: North America, tributaries of lower Susquehanna River, Harford County in Maryland, USA. Species factsScientific nameEtheostoma sellareFamilyPercidae (Perches)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length8.4Common length5.8EnvironmentFreshwater; benthopelagicClimateTemperateDistributionNorth America: tributaries of lower Susquehanna River, Harford County in Maryland, USA.Conservation status (IUCN)Extinct (EX)Threat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (tmax=2) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026