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The sea otter (Enhydra lutris) is a marine mammal native to the coasts of the northern and eastern North Pacific Ocean.Adult sea otters typically weigh between 14 and 45 kg (30 and 100 lb), making them the heaviest members of the weasel family, but among [3] the smallest marine mammals.
A sea otter using a rock to break open a shell. The sea otter, Enhydra lutris, is a member of the Mustelidae that is fully aquatic. Sea otters are the smallest of the marine mammals, but they are also the most dexterous. Sea otters are known for their ability to use stones as anvils or hammers to facilitate access to hard-to-reach prey items.
Sea Otters can swim up to six miles per hour and hold their breaths for up to four minutes. They use these skills to dive as deep as 330 feet beneath the surface. 4.
In 1911, when sea otters were so scarce that hunting was no longer profitable, they were protected under the international Fur Seal Treaty, and after further conservation measures the sea otter population increased from 2,000 to between 110,000 and 160,000 from 1911 to the mid-1970s. Today, most of the species' original habitat in Alaska has ...
In the 1700s, before they were hunted for their fur, there were thought to be 150,000 to 300,000 sea otters. Today, they have rebounded since their numbers were at their lowest, but they are still ...
Sea otters also are members of the animal kingdom's tool-wielding club. The researchers observed 196 southern sea otters along the central California coastline - Big Sur, Monterey, San Luis Obispo ...
Cephalopods, as active marine predators, possess sensory organs specialized for use in aquatic conditions. [1] They have a camera-type eye which consists of an iris, a circular lens, vitreous cavity (eye gel), pigment cells, and photoreceptor cells that translate light from the light-sensitive retina into nerve signals which travel along the optic nerve to the brain. [2]
On land, sea otters and pinnipeds often perform ‘nosing’ behaviours at prominent scent glands which indicate some level of detection of chemical signals. It was previously perceived that they do not undergo chemical communication underwater, as most of these animals close their nasal opening underwater and the semi-aquatic mammals are known ...