He was the top predator in the ocean during the late Devonian period (approximately 380 to 360 million years ago) and is known as the "king of the Devonian period". This ancient creature is known for its massive size and fierce appearance, with its head and neck covered in thick bone armor, and its jaw equipped with sharp edges resembling a guillotine, capable of cutting and crushing almost anything. Fossils are mainly found in the United States in North America, but have also been discovered in Europe. Living in shallow waters, preying on sharks, bony fish, trilobites, ammonites, and parrots. As the first super predator after the emergence of vertebrates, it disappeared during the mass extinction in the late Devonian period.