The spiny butterfly ray, also known as the giant butterfly ray is a large, broad ray that can measure to over 6.7 ft. crosswise, with a lozenge-like shaped pectoral fin disk, as they are wider than they are long. They have concave front margins with rounded corners. They have short and blunt snouts, high cone-shaped teeth with around 98-138 rows on their upper jaw and 78-110 rows on their lower jaws. Within both their jaws, there are about 10-12 functional rows of teeth, with a dental band using 70% of the width of the jaw each. They have a short and slender tail, about a fourth of the width of the fin disk, with upper and lower fin folds.