A well-known representative of the mustelid family and the only otter species found in the Czech Republic. Its body is supremely adjusted to aquatic life. It has a short, light to deep brown fur coat with a white underbelly. A characteristic trait of otters is their webbed paws. Otters are bound to watery habitats, where they can find their food. The European Otter is a solitary animal, and only briefly forms pair bonds during courtship and mating. The adult specimen weighs about 6 – 12 kg and measures 80 – 130 cm, including the tail. Females are physically smaller than males.