From Longman Dictionary of Contemporary Englishstingraysting‧ray /ˈstɪŋreɪ/ noun [countable] 
HBPa large flat fish that has a long tail with sharp poisonous points on it
HBPa large flat fish that has a long tail with sharp poisonous points on itExamples from the Corpus
stingray• The greatest threat to humans comes from the stingrays, large flatfish that lie inconspicuously on the seabed in shallow waters.• Three stingrays glide past like abandoned white pocket handkerchiefs. 