HomeFish encyclopediaRay-finned fishesPerch-like fishCichlidsYellow meeki Yellow meeki (Thorichthys affinis) Scientific name: Thorichthys affinis G?nther, 1862 The Yellow meeki (Thorichthys affinis) 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 upper Usumacinta River basin in Guatemala, and Belize. Yellow meeki care at a glanceTemperature26–30°C (79–86°F) BiologyInhabits both lakes and lower valley rivers, preferring sandy or soft bottoms with small rocks.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameThorichthys affinisFamilyCichlidae (Cichlids)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length14.0EnvironmentFreshwater; benthopelagicClimateTropicalDistributionCentral America: Atlantic slope, in the upper Usumacinta River basin in Guatemala, and Belize.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