Stingrays skeleton is made of cartilage not bones. Unlike bony fish, stingray do not have a gill covering. Instead water flows into the gills, into the gill slits. The bodies of stingrays are covered with tiny placoid scales, known as dermal pentacles. The skin is used to make leather goods and high end commodities.

 

Stingrays have large pectoral fins that not only give them a unique feature, but it aids them in locomotion. Benthick Rays, tend to "ripple" their fins to swim above the sea floor while, pelagic rays flap their pectoral fins and appear to fly through the water.