HomeFish encyclopediaRay-finned fishesPerch-like fishSunfishesGuadalupe bass Guadalupe bass (Micropterus treculii) Scientific name: Micropterus treculii Vaillant & Bocourt, 1874 The Guadalupe bass (Micropterus treculii) is a freshwater fish of the family Centrarchidae. Native range: North America, found only on Edwards Plateau in Brazos, Colorado, Guadalupe, San Antonio and upper Nueces (where introduced) River drainages in Texas, USA. BiologyOccurs in gravel riffles, runs and flowing pools of creeks and small to medium rivers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMicropterus treculiiFamilyCentrarchidae (Sunfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length46.4EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: found only on Edwards Plateau in Brazos, Colorado, Guadalupe, San Antonio and upper Nueces (where introduced) River drainages in Texas, USA.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesGamefish: 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