Potamotrygon motoro (Müller & Henle, 1841)
South American freshwater stingray
photo by Murch, A.

Family:  Potamotrygonidae (River stingrays), subfamily: Potamotrygoninae
Max. size:  50 cm WD (male/unsexed); max.weight: 34 kg
Environment:  benthopelagic; freshwater; pH range: 5 - 6; dH range: 10, potamodromous
Distribution:  South America: Uruguay, Paraná-Paraguay, Orinoco, and Amazon River basins.
Biology:  Found in freshwater rivers. It is an extremely dangerous species. Maximum length reported in Axelrod et al., 1991 (Ref. 6398) is 100 cm TL.
IUCN Red List Status: Data deficient (DD); Date assessed: 01 October 2005 Ref. (130435)
Threat to humans:  traumatogenic

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