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| Otters | ||||||||||||
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European River Otter s | ||||||||||||
| Scientific classification | ||||||||||||
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Amblonyx Aonyx Enhydra Lontra Lutra Lutrogale Pteronura |
Otters have a dense layer 1,000 hairs/mm² (~650,000 hairs/in²) of very soft underfur which, protected by their outer layer of long guard hairGuard hairs are the longest, thickest hairs in a mammal's coat. They taper to a point and protect the undercoat from the elements. They are often waterproof and stick out above the rest of the coat. See also Fur.s, keeps them dry under water and traps a layer of air to keep them warm. Unlike most marine mammals ( sealsOtariidae Phocidae Odobenidae Pinnipeds are large marine mammals belonging to the Pinnipedia a family (sometimes a suborder or superfamily, depending on the classification scheme) of the order Carnivora. The true seals, sea lions, fur seals and Walrus are, for example, or whaleWhales are the largest species of exclusively aquatic placental mammals, dfsgRSFNjg A complete up-to-date taxonomical listing of all cetacean species, including all whales is maintained at the Cetacea article. Anatomy Like all mammals, whales breathe airs), otters do not have a layer of insulating blubberBlubber is a thick layer of insulating fat found under the skin of cetaceans and various other animals living in extremely cold climates ( seals, walruses). Blubber forms an important part of the traditional eskimo diet because of its high energy value., and even the marine Sea OtterSea Otter Scientific classification Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Family: Mustelidae Subfamily: Lutrinae Genus Enhydra Species lutris Binomial name Enhydra lutris ( Linnaeus, 1758) The Sea Otter Enhydra lutris is a la must come ashore regularly to wash its coat in fresh water.
All otters have long, slim, streamlined bodies of extraordinary grace and flexibility, and short limbs; in most cases the paws are webbed. Most have sharp claws to grasp prey but the Short-clawed Otter of southern Asia has just vestigal claws, and two closely related species of African otter have no claws at all: these species live in the often muddy rivers of Africa and Asia and locate their prey by touch.
Fish is the primary item in the diet of most otters, supplemented by frogs, crayfish, and crabs; some have become expert at opening shellfish, and others will take any small mammals or birds that happen to be available. To survive in the cold waters where many otters live, the specialised fur is not enough: otters have very high metabolic rates and burn up energy at a profligate pace: Eurasian Otter s, for example, must eat 15% of their body weight a day; Sea OtterSea Otter Scientific classification Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Family: Mustelidae Subfamily: Lutrinae Genus Enhydra Species lutris Binomial name Enhydra lutris ( Linnaeus, 1758) The Sea Otter Enhydra lutris is a las, 20 to 25%, depending on the temperature. In consequence, otters are very vulnerable to prey depletion: in water as warm as 10°C an otter needs to catch 100 g of fish per hour: less than that and it cannot survive. Most species hunt for 3 to 5 hours a day; nursing mothers up to 8 hours a day.
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