HomeFish encyclopediaRay-finned fishesPerch-like fishPerchesSmallscale darter Smallscale darter (Etheostoma microlepidum) Scientific name: Etheostoma microlepidum Raney & Zorach, 1967 The Smallscale darter (Etheostoma microlepidum) is a freshwater fish of the family Percidae. Native range: North America, lower Cumberland River drainage in western Kentucky and northern central Tennessee, USA. BiologyOccurs in clear, shallow gravel riffles of small rivers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEtheostoma microlepidumFamilyPercidae (Perches)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length7.2Common length4.8EnvironmentFreshwater; benthopelagicClimateSubtropicalDistributionNorth America: lower Cumberland River drainage in western Kentucky and northern central Tennessee, USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026