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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.
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.
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.
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]
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The sea otter may also pluck snails and other organisms from kelp and dig deep into underwater mud for clams. [83] It is the only marine mammal that catches fish with its forepaws rather than with its teeth. [84] Under each foreleg, the sea otter has a loose pouch of skin that extends across the chest.
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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 ...