Potamotrygon | 水產百科網
Potamotrygonvaryconsiderablyincolor,patternandsize,withthemaximumdiscwidthrangingfrom31cm(1ft)inP.wallaceito1.5m(5ft)inP.brachyura.
Genus of cartilaginous fishes
Potamotrygon is a genus of freshwater stingrays in the family Potamotrygonidae native to the rivers of South America,[1] and sometimes seen in the aquarium trade.[2]
Like other stingrays, the fishes of this genus have venomous barbs at the base of their tails, and their stings are dangerous to humans.[2] It is said that the natives of South America fear the stingray more than they do fear the piranha.[3]
Potamotrygon vary considerably in color, pattern and size, with the maximum disc width ranging from 31 cm (1 ft) in P. wallacei to 1.5 m (5 ft) in P. brachyura.[4][5]
In the aquarium[edit]Though freshwater stingray of other genera do appear in the trade, most are from Potamotrygon. They are best kept with a deep, sandy substrate, in wh...
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