HomeFish encyclopediaRay-finned fishesPerch-like fishPerchesEmerald darter Emerald darter (Etheostoma baileyi) Scientific name: Etheostoma baileyi Page & Burr, 1982 The Emerald darter (Etheostoma baileyi) is a freshwater fish of the family Percidae. Native range: North America, occurs only in the upper Kentucky and upper Cumberland River drainages in eastern Kentucky and northeastern Tennessee, USA. BiologyInhabits rocky pools, sometimes riffles, of creeks and small to medium rivers. Feeds primarily on midge larvae and pupae, also eats caddisfly and mayfly immatures and microcrustaceans.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEtheostoma baileyiFamilyPercidae (Perches)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length5.6EnvironmentFreshwater; benthopelagicClimateTemperateDistributionNorth America: occurs only in the upper Kentucky and upper Cumberland River drainages in eastern Kentucky and northeastern Tennessee, USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceHigh, 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