HomeFish encyclopediaRay-finned fishesPerch-like fishCichlidsBlackgullet cichlid Blackgullet cichlid (Thorichthys pasionis) Scientific name: Thorichthys pasionis Rivas, 1962 The Blackgullet cichlid (Thorichthys pasionis) is a freshwater fish of the family Cichlidae. In the aquarium it needs water at 26–30°C (79–86°F). Native range: Central America, Atlantic slope, in the Usumacinta River drainage in Mexico and Guatemala. Blackgullet cichlid care at a glanceTemperature26–30°C (79–86°F) BiologyInhabits both rivers and lakes with softer substrate.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameThorichthys pasionisFamilyCichlidae (Cichlids)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length17.0EnvironmentFreshwater;; pH range: 8.0 - 9.0; dH range: 5 - ? benthopelagicClimateTropicalDistributionCentral America: Atlantic slope, in the Usumacinta River drainage in Mexico and Guatemala.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