It is a mammal belonging to the family Ophthalmidae in the order Cetiformes. The body shape is very unique, with a white belly and a black back mixed with blue gray or black gray spotted patterns. The head has a long horn of about 1-2 meters, a small and round head, no protruding beak, protruding forehead, and small and wide pectoral fins, but short in length. Named after a "horn" growing on the head. Distributed in the Russian waters of the Atlantic and Arctic Oceans, inhabiting the Arctic Circle waters. The main food is fish or mollusks. Due to their extreme picky eating habits and unchanging migration routes, they face a high risk of being hunted by humans, resulting in a decreasing population.