The Arctic fox (Vulpes lagopus), also known as the white fox, polar fox, or snow fox, is a small, hardy mammal native to the Arctic regions of the Northern Hemisphere. It is incredibly well adapted to cold environments, with a thick, warm coat that changes colour with the seasons. In winter, their fur is white, helping them blend into the snowy surroundings, while in summer, it turns brown or grey, providing camouflage in the tundra's rocky and barren landscape.

Arctic foxes have thick fur that provides insulation, and their compact body shape—short legs, ears, and muzzle—reduces heat loss. Their furry soles also provide traction and warmth when walking on snow and ice.

Arctic foxes are solitary and territorial animals. They live in dens, often built into the sides of hills or riverbanks, to protect themselves from predators and extreme weather.