HomeFish encyclopediaRay-finned fishesPerch-like fishPerchesGreenside darter Greenside darter (Etheostoma blennioides) Scientific name: Etheostoma blennioides Rafinesque, 1819 The Greenside darter (Etheostoma blennioides) is a freshwater fish of the family Percidae. In the aquarium it needs water at 4–18°C (39–64°F). Greenside darter care at a glanceTemperature4–18°C (39–64°F) BiologyInhabit rocky riffles of creeks and small to medium rivers, and shores of large lakes. Juveniles feed on midge larvae and microcrustaceans; adults consume midge larvae, blackfly larvae, and other immature aquatic insects, primarily mayflies and caddisflies. Distinct pairing during breeding. Eggs are found attached to the substrate unguarded.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEtheostoma blennioidesFamilyPercidae (Perches)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length17.0Common length5.5EnvironmentFreshwater; benthopelagicClimateTemperateDistributionNorth America: Great Lakes and Mississippi River basins from New York and Maryland to eastern Kansas and Oklahoma in the USA, and from Ontario in Canada south to Georgia, Alabama and Arkansas in the USA; and Atlantic Slope in Mohawk, Susquehanna and Potomac drainages in New York and Virginia, USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (tmax=5; Fec=404-1,832) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026