A Stingray has the capability to kill a person, and the article explains the reasons behind this ability. The article details how Stingrays have a sharp, venomous barb located on their tail that they use as a defense mechanism when feeling threatened. When a Stingray senses danger, it may use its barb to sting an individual, potentially leading to a lethal outcome. The venom in a Stingray's barb can cause severe pain, tissue damage, and in some cases, even death if not treated promptly. The article also discusses how Stingrays are generally peaceful creatures and only resort to using their barbs in self-defense.