Otters have streamlined bodies with rounded heads and thick, tapered tails. Sea otters can grow up to 5 feet long and weigh in excess of 60 pounds while river otters are usually around 4 feet lengthwise and weigh up to 30 pounds. Both species have brown to reddish-brown coats, webbed feet, and dense fur that helps them swim and stay warm. The thick whiskers of the animal aid in foraging for food, as do their retractable claws.
More information on what an otter looks like.
Otters are often confused with beavers.