There are three types of freshwater stingrays — Potamotrygon castexi, Potamotrygon leopoldi, andPotamotrygon motoro — that live in the Amazon River system.
They are some of the only stingrays that live in freshwater rather than salt water.
Science fact of the day: 3 types of freshwater stingrays live in the Amazon River
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