The muzzle is broad and short, with long sideburns. The neck is short, thick head. Eyes round, small, highly planted and give the predator an excellent overview. On each foot, five fingers, connected by a webbed and armed with strong claws. The front legs of the otter are shorter than the rear legs, which allows them to swim perfectly.
When the otter swims slowly, she rowing with all four paws, and a diving or fast swimming animal works only tail and strong hind legs, short front paws to the sides of your body. During immersion under water nostrils and ears are closed. Fur from common otter brown or dark brown in colour, but the belly is light silvery.