When the Emperor Penguin swimming. Friction between the body with water, making them swim slowly. As a result, the maximum speed is between 1.2 to 2.7 meters per second, but they can speed up two or even three times in a short time, by releasing air from the House Elf, small bubbles, which are transport AIDS to reduce the density and the viscosity of the water around the Penguin, which is equal to a reduction of tension and help it speed up, which is not possible with normal movements (increased speed helped the penguins escape the animals hunters like Leopard seals).
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