AQUARIUM VIII: NARWHALS

In cold waters in Arctic, narwhal, famous for its long twisted fang, travels in large herds. This unique cetacean hunts submerging to great depths and can hold for half an hour under water. His horn still carries mystery, still have doubts about the use they give him.
In the middle ages, when the vikings found narwhal tusks, these were sold in Europe as unicorn horns.