Physical Description. Lacking blubber, otters have amazingly thick fur to assist in retaining heat. Otter - Otter - Conservation and classification: Nearly all species of otters face increasing threat as urbanization and logging continue. Description. The muzzle has a set of thick vibrissae. These are ready-to-use Sea Otter worksheets that are perfect for teaching students about the sea otters which are born swimmers with long, sleek, streamlined bodies with webbed feet. The sea otter’s fur also is designed to trap air to further insulate it from the cold water and to provide additional buoyancy. Sea otters get around with their sandpaper like paws, webbed feet, and flat tails. and 3 to 14 kg (7-31 lbs.). Description. Sea Otters have very distinct habitats. Adult male California sea otters average 29 kg in mass, while females average 20 kg. Otters are long and slim animals that can be longer than a meter. The paws on a sea otter’s hind feet are webbed. Fish and Wildlife Service. 5. Sea otters are incredibly clean and keep their waterproof coats in perfect condition. They can be up to 100 pounds so they are the heaviest of all species. The large head has a blunt snout, and is connected to the body by a short, stocky neck. The sea otters usually live near the shore waters of the North Pacific, from Japan, north to the coast of the Kamchatka Peninsula, then from Alaska down along the Pacific coast of North America to Baja, California. River otters range in size from about 87 to 153 cm (34-60 in.) Sea otters eat 25 percent of their body weight in food every day. Sea Otter is the heaviest of the otters, reaching a maximum weight of 45 kg. The sea otter has long whiskers and water-repellent coat that insulates the animal from freezing water. Sea otters are carnivores in the family Mustelidae—a group of animals that also includes terrestrial and semi-aquatic forms such as weasels, badgers, skunks, fishers, minks, and river otters.Sea otters are the only fully aquatic form of otters, but they share features with the others such as thick fur and short ears. They have 850,000 to 1,000,000 hairs per square inch consisting of two layers, an undercoat and longer guard hairs. Photo by U.S. In a study done in Alaska, it was found that the most common age range was pups (0-1 years of age) as shown in figure 3. Sea Otter – Enhydra lutris Description. Fur: A sea otter's fur is the thickest and finest of any mammal. The characteristics of the otter. People affect sea otter populations through direct shootings and trapping sea otters in fishing nets. Individuals can weigh as much as 45 kg. The Sea Otter has a small round face that is absolutely adorable. Sea otters’ diet includes sea urchins, crabs, mussels, and clams, which they’re known to … The fur of the sea otter is the densest of all mammals at about 350,000 to 1,000,000 hairs per square inch, compared to dogs that only have 1,000 to 60,000 hairs per square inch. Sea otters have no insulating fat, but trap air under their coasts as insulation. The sea otter will generally live between 10 and 20 years, and maintain a relatively constant age structure. They usually stay on all four legs, but they can stand up as well but they are expert swimmers and spend a lot of time in water. They have four short legs. ). This information shows that the sea otter … A baby sea otter will cry when it is left alone. The Sea Otter ranks as one of the smallest species of marine mammals. Northern River Otters. Despite what many people believe, otters are not related to beavers. The body of the sea otter is relatively long and heavy, making progress on land clumsy and slow. However, it also represents the heaviest known type of mustelid. They don’t use their teeth to tear food though like many other animals do. Otters are a species that belongs to the mustelids, meaning they’re related to ferrets, badgers, and minks. Sea otter is the heaviest and the second smallest aquatic member of weasel family. They have four short legs. The Dangers Faced By Sea Otters. Sea otters are brown in fur color that often lightens with age . This helps the sea otter swim faster. The Alaskan sea otter population numbered more than 100,000 in the 1980s. Description of the River Otter. The large hind feet are broad and flipperlike. Many sea otters live near rocky sea bottoms and shorelines, where marine communities are extremely diverse. Sea Otter - Physical characteristics. Sea otters wrap themselves in kelp or hold hands when sleeping to prevent drifting. They have very thick fur – near about 250,000 to one million hair per square inch. A sea otter’s range mass can be from 14-45 kg (30.84-99.12 lbs) and range in length from 1-1.5 meters (3.28-4.92 ft) (Allerga, Rath and Gunderson, 2012). If the otter gets scared it may flip to its stomach or dive under the water. The North American river otter (Lontra canadensis) is a semiaquatic mammal in the weasel family.While it may simply be called the "river otter" in North America (to distinguish it from the sea otter) there are other river otter species throughout the world. All of these characteristics help the sea otter move and get around on their backs. Males weigh 22-45 kg and are 1.2-1.5 m in length.Females are slightly smaller, weighing 14-33 kg and measuring 1-1.4 m in length. Distinctive Characteristics The sea otter is the most derived of the otters. Description . Sea otters are just as full of interesting characteristics as they are full of cuteness! Sea Otter (Enhydra lutris), largest and most marine weasel, lives exclusively in shallow seas of the N Pacific, formerly from Japan to California.Ruthless hunting for their valuable pelts almost exterminated sea otters before 1900. ... All of the species except the Sea Otter feature three pairs of powerful incisors. and are the smallest marine mammal in North America. They have a thick fur coat that keeps them warm even in freezing water. Otters will whistle or whine when upset or frustrated. They belong to the weasel family. First, one of the biggest threats to the existence of sea otters is humans. Since the 1990s, the southwestern stock of Alaskan sea otters has experienced a dramatic (up to 70% population) decline, most likely due to increased predation by killer whales. The nostrils and ears of sea otters close in the water. These river otters are also a carnivorous mammal belonging to the Mustelidae family, and were first described in 1777 by the German naturalist Johann Christian Daniel von Schreber.. Main Characteristics Most have sharp claws on their feet and all except the sea otter have long, muscular tails. 7. They are also known as Common otters, North American River Otters or Canadian Otters, and their scientific name is. North American river otters (L. canadensis) are still taken as part of the commercial fur trade, but the primary threats to others are the destruction of wetland habitats and pollution. They usually stay on all four legs, but they can stand up as well but they are expert swimmers and spend a lot of time in water. The sea otter, however, rarely comes ashore, according to the San Diego Zoo. , ranging from 100 to 153 cm ( 34-60 in. ) do with otters ashore according... 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