HomeFish encyclopediaRay-finned fishesPerch-like fishSunfishesWarmouth Warmouth (Lepomis gulosus) Scientific name: Lepomis gulosus Cuvier, 1829 The Warmouth (Lepomis gulosus) is a freshwater fish of the family Centrarchidae. In the aquarium it needs water at 10–20°C (50–68°F). Warmouth care at a glanceTemperature10–20°C (50–68°F) BiologyUsually occurs over mud in vegetated lakes, ponds, swamps and quiet water areas of streams.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameLepomis gulosusFamilyCentrarchidae (Sunfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length31.0EnvironmentFreshwater;; pH range: 7.0 - 7.5; dH range: 10 - 20 demersalClimateTemperateDistributionNorth America: Great Lakes and Mississippi River basins from western Pennsylvania to Minnesota in the USA, and south to the Gulf of Mexico; Atlantic and Gulf drainages from Rappahannock River in Virginia to Rio Grande in Texas and New Mexico, USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquaculture: commercial; gamefish: yesResilienceMedium, minimum population doubling time 1.4 - 4.4 years (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