The six-gilled shark, scientifically known as Hexanchus griseus, is a deep-sea predatory shark characterized by its six gill slits on each side of its body. These sharks are also known by other names such as cow shark, gray shark, and bluntnose six-gilled shark. They are found in the cool, deep waters around the world and are known for their unique hunting techniques. Despite their intimidating appearance, six-gilled sharks are not known to be a significant threat to humans, and they play an important role in maintaining a healthy balance in the marine ecosystem. Overall, the six-gilled shark is a fascinating and often misunderstood species that continues to captivate scientists and shark enthusiasts around the world.