There are only six species of whales in the Arctic waters, which are far less than those in the Southern Ocean, but narwhals and beluga whales in the Arctic Ocean are the most precious whale species in the world. The narwhal is 6 meters long, and the male maxilla has 1 ~ 2 straight spiral angles, which is 2.4 ~ 2.7 meters long, similar to the spear of the medieval reloading knight. People haven't figured out the use of this long horn in the narwhal's life, but obviously, this long horn once had the same price as the same weight of gold in the market. The fate of narwhals is self-evident, and they have recently been regarded as endangered animals. Beluga belongs to the dolphin family, with a white body and a body length of 3.7 ~ 4.3 meters. It's hard to find them recently. The largest whale in the Arctic is the Greenland whale, which is 20-22 meters long and weighs 150 tons. Newborn whales are generally three or four meters long and weigh about two tons. The mother whale loves her baby very much. When she was in danger, she used her body to protect her young and frantically stopped the attack of whaling ships. There is a small and strange-looking whale called narwhal in the Arctic. It is only 4-5 meters long and weighs about 900- 1500 kg. Its shape is very strange, with an angle of about 1 ~ 2 meters on its head. The local residents nicknamed it unicorn. In fact, the narwhal's horn is not a horn, but a big tooth. Some people call it a toothed whale. For hundreds of years, people have been studying the physiological effects of toothed whales, especially on extremely long teeth.