The Southern Stingray (Hypanus americanus) is a whiptail stingray found in tropical and subtropical waters of the Western Atlantic Ocean from New Jersey to southern Brazil. It has a flat, diamond-shaped disc, with a mud brown, olive, and grey dorsal surface and white underbelly (ventral surface). The barb on its tail is serrated and covered in a venomous mucous, used for self-defense.
When a predator is around, stingrays will hide under the sand by undulating their wings, flipping sand on top of themselves. This lets them hide from their main predator, hammerhead sharks.