HomeFreshwater aquarium fishOddballs & predatorsLargespot river stingray Largespot river stingray (Potamotrygon falkneri) Scientific name: Potamotrygon falkneri Castex & Maciel, 1963 The Largespot river stingray (Potamotrygon falkneri) is a freshwater fish of the family Potamotrygonidae. Native range: South America, Paran?-Paraguay River basin, from Cuiab? and Piquiri rivers (among others) to the La Plata River. BiologyAfter a gestation period of about 20 weeks two pups were born in a public aquarium.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePotamotrygon falkneriFamilyPotamotrygonidae (River stingrays)OrderRajiformes (Skates and Rays)ClassElasmobranchii (Sharks and Rays)Maximum length60.0EnvironmentFreshwater; benthopelagicClimateTemperateDistributionSouth America: Paran?-Paraguay River basin, from Cuiab? and Piquiri rivers (among others) to the La Plata River.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: of no interest; aquarium: show aquariumResilienceVery Low, minimum population doubling time more than 14 years (Fec=2) More oddballs & predatorsAfrican knifefishXenomystus nigriGray bichirPolypterus senegalus senegalusAfrican ReedfishErpetoichthys calabaricusIndochina featherbackChitala blanciArawanaOsteoglossum bicirrhosumPetrocephalus bovei boveiSee all oddballs & predators SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026