2. Arctic musk ox: It looks like a domestic cow, but it runs like a sheep instead of a cow. It has a big beard and its hair can be dragged to the ground. Studies by zoologists show that musk oxen are closer to goats and sheep. Close relatives of musk oxen can be found in the tropics. They are different from pronghorn in four ways. Musk ox does not secrete any musk. There are only a few musk oxen in the Arctic, totaling about 7,000.
3. Arctic golden pheasant: Golden pheasants distributed in most parts of Alaska and Arctic Canada will fly to Labrador coast in southeastern Canada in autumn, where they will have a short rest and have a full meal. After storing enough fat in the body, it will fly nonstop across the Atlantic Ocean to Surinam in South America, flying more than 4,500 kilometers in one breath, and finally coming to the Argentine pampas grassland for the winter.
4. Arctic cod: distributed throughout the Arctic, it is a typical cold-water fish. When the temperature exceeds 5℃, they will disappear. It is a small and medium-sized fish, the longest of which can reach 36 cm, and it is one of the important economic fish in the Arctic.
5. Antarctic krill: Arthropod, also known as krill or Antarctic krill, is a kind of krill that lives in the Antarctic waters of the Antarctic Ocean. Antarctic krill is a kind of invertebrate similar to shrimp, which lives in groups, sometimes with a density of 0/0000-30000 per cubic meter.
Baidu Encyclopedia-Arctic
Baidu encyclopedia-Antarctic krill