
Sea Otter: “Sea Otters have absolutely the finest fur in the animal kingdom. They have an incredibly dense and beautiful fur, up to one million hairs per square inch. By comparison, a dog has about 60,000 hairs per square inch. Otters don’t have a blubber layer like most marine mammals, it’s the fur that keeps them warm and allows them to live in Alaskan waters.” Jim Bodkin, marine biologist.
River Otter: Known as the Land Otter, ranges throughout most of the Canada and the United States, especially throughout Alaska and the offshore islands of the Bering Sea. Adults weigh 15 to 35 pounds (6.8-15 kg) and are 40 to 60 inches (102-152 cm) in length. On average females are about 25 percent smaller than males. When prime, River Otter fur appears black-brown, with the belly slightly lighter in color than its back. The chin and throat are grayish. Otter fur consists of a very dense undercoat overlaid with longer guard hairs, which are usually removed by furriers.
Giant Otter: The South American cousin to the Sea and River Otters of North America, as well as those of Europe and Africa. It can grow to more than 6 feet (2 meters) long and 70 pounds (32 kg), nearly twice as large as its American counterparts. Giant Otters once were found throughout the tropical rain forests of the Amazon, down to Brazil’s Pantanal, the world’s largest wetland. Today they are found only in the most remote waters in tropical South America.
Sea Otters spend almost half their day grooming their fur in order to keep it waterproof and warm – dirty, matted fur would soon lose its insulating properties and put the Otter in peril from cold. This is because the Sea Otter has no insulating fat or blubber like seals and whales. Otter fur is the densest of any mammals, with over 800 million hairs on a large adult! Otter groups are called ‘rafts’.
It is the Otter’s fur that brought the animal to the brink of extinction. In 1745, when fur traders advanced from Siberia eastward along the Aleutian Island chain to Alaska’s Pacific coast, they were seeking Otter pelts for the Asian fur market. The result was drastic. A species that once numbered 300,000 and spread from the Baja Peninsula to the Sea of Japan had by 1899 dwindled to a few thousand Otters in Alaska and a few dozen in California. Attempts at raising them in captivity failed in the late 19th century.
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