Stingray teeth are flattened and made of modified placoid scales (also called dermal denticles). These are the same type of scales found on a shark’s body.  Do Stingrays Replace Teeth? Like ...

Fish experts believe the giant stingray, such as this one in Cambodia's Mekong River, is the largest freshwater species on Earth. This specimen measured more than 13 feet (4 meters) long.