Rich brown fur on upper body, fur with silver sheen on underside. Dens dug into banks with entrances underwater. There are few things in life more joyful than watching an otter just being an otter.
River otters have a rich brown fur which is water repellant.
The belly has a silvery sheen. There are 4 mammae. Otter tails are fur covered, wide at the base but tapering down to a tip. Otter's feet are webbed but with 5 distinct toes and a footpad on each foot. Otters possess 36 teeth with which they dine on fish, frogs, crayfish and other aquatic invertabrates.