Dark Side Earth - Dark Wonders of Earth on Instagram: "stingray is a flat-bodied fish closely related to sharks, part of the group known as cartilaginous fish — meaning their skeletons are made of cartilage instead of bone. Using their wide, wing-like fins, stingrays gracefully “fly” through the water, gliding just above the seafloor. Their eyes sit on top, while their mouths, nostrils, and gill slits are underneath — a perfect design for hunting prey hidden in the sand. #explainingoceans #sting