The sea otter (Enhydra lutris), the smallest marine mammal in the world, is well adapted for its predominately aquatic lifestyle, possessing a strong, rudder-like tail and large hind-feet that act as flippers. Unlike other marine mammals, sea otters do not have blubber and instead rely on their fur to keep warm in the water; their reddish-brown coat is the densest of any mammal, consisting of around 100,000 hairs per cm². The natural oils produced by the fur provide a waterproof quality.
- It played Connor in Thomas and Friends (NatureRules1 Version)
- It played Surfer in The Animal Movie (NatureRules1 Version)
- They played The Monkeys in King of Sea Creatures and Walrus and the King
- It played Limey in Animal Lockdown
- It played Kuki Sanban/Numbuh 3 in Codename: Marine Mammals Next Door
- It played Charlie in We Bare Mustelids and We Bare Mustelids: The Movie
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