Any coldwater rays ?

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fwprawn

Jack Dempsey
MFK Member
Jul 29, 2011
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As the title says - are there any coldwater, freshwater rays - with "coldwater" meaning unheated - indoors, of course, so we aren't talking about freezing - but probably 50 degree water at the lowest, and warm in the summer based on average air temp.
 
Don't think you're going to have much luck finding any coldwater FW rays. Most species occur within the equatorial region with species numbers thinning out within the Tropic of Cancer and Tropic of Capricorn.
 
Some freshwater stingrays from Argentina tolerate low temperatures.
For example potamotrygon falkneri. Here is a map where this species occurs:
http://www.scielo.br/img/revistas/ni/v9n1/a21fig11m.jpg

In wintertime the temperature of the water in south Argentina is around 59F (15°C).

I was wondering about Argentinian rays - Jeremy Wade was fishing some cold-looking rivers for rays in one episode of River Monsters.
 
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