Are stingrays mammals?

Stingrays are common in coastal tropical and subtropical marine waters throughout the world. Some species, such as Dasyatis thetidis, are found in warmer temperate oceans, and others, such as Plesiobatis daviesi, are found in the deep ocean. read more

Stingrays:-are not warm blooded. have a cartilaginous skeleton with no calcified bone. breath through gills. have no hair, no limbs, and at the risk of sounding crass, no breasts to feed their young with milk (the most distinctive characteristic of mammals to a layman). read more

Specifically, stingrays are members of the class Chondrichthyes which comprise the jawed fish which have paired fins, paired nares (nostrils), scales and two-chambered hearts. These fish have skeletons which are made of cartilage rather than bone. read more