Dasyatis sabina (Lesueur, 1824)
Although freshwater populations of Atlantic stingrays have recently been discovered in northern Florida, this species is not a true freshwater ray in the physiological sense. Atlantic stingrays are euryhaline, meaning that they have the ability to move back and forth between marine, brackish, and freshwater ecosystems. With the exception of remaining slightly smaller, St. John's River stingrays are virtually identical to their marine counterparts. For more information on this species, see the natural history page.