Potamotrygon orbignyi (Castelnau, 1855)
Smooth back river stingray
photo by Landines, M.

Family:  Potamotrygonidae (River stingrays), subfamily: Potamotrygoninae
Max. size:  35 cm WD (male/unsexed); 32.5 cm WD (female); max.weight: 1,400.0 g; max.weight: 2,000.0 g
Environment:  benthopelagic; freshwater; pH range: 6.80000019073486 - 7.5
Distribution:  South America: Widespread in Amazon and Orinoco River basins and in river systems in Suriname, Guyana and French Guiana.
Biology:  Occurs in stream swamps, floodplain lakes and artificial lagoons. Feeds mainly on insects and benthic crustaceans (Ref. 27749).
IUCN Red List Status: Least Concern (LC); Date assessed: 24 June 2003 Ref. (130435)
Threat to humans:  harmless

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