Rays obtain oxygen rich water through a. their mouths c. moving to pass water over their gills b. small holes in their heads d. swimming to shallow water

Stingrays, like other fish, use gills. Stingrays do not pump water through their gills like other fish, though - they have gill slits that water can pass over. Stingrays use an extra adaptation for breathing called spiracles. Spiracles are small openings near their eyes that they use to breathe while resting on the ocean floor, buried in sand, or eating. They breathe in through these spiracles, and the water is expelled through their gills. 

Extrusive;