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The dugong lacks nails on its flippers, which are only 15% of a dugong's body length. [19] The tail has deep notches. [23] A dugong's brain weighs a maximum of 300 g (11 oz), about 0.1% of the animal's body weight. [19] With very small eyes, [24] dugongs have limited vision, but acute hearing within narrow sound thresholds.
The manatee's tail is paddle-shaped, and is the clearest visible difference between manatees and dugongs; a dugong tail is fluked, similar in shape to that of a whale. The manatee is unusual among mammals in having just six cervical vertebrae, [11] a number that may be due to mutations in the homeotic genes. [12]
[30] [32] Unlike manatees, the dugong lacks nails on its flippers, which are only 15% of a dugong's body length. [33] Manatees generally glide at speeds of 8 kilometres per hour (5 mph), but can reach speeds of 24 kilometres per hour (15 mph) in short bursts. [34] The body is fusiform to reduce drag in the water.
In contrast, other marine mammals—such as whales, dolphins, porpoises, manatees, dugongs, and walruses—have lost long fur in favor of a thick, dense epidermis and a thickened fat layer (blubber) to prevent drag. Wading and bottom-feeding animals (such as manatees) need to be heavier than water in order to keep contact with the floor or to ...
The West Indian manatee is the largest living member of the sirenians (order Sirenia), a group of large aquatic mammals that includes the dugong, other manatees, and the extinct Steller's sea cow. Manatees are herbivores , have developed vocal communication abilities, and are covered in highly sensitive whiskers (called vibrissae ) that are ...
We often misinterpret the wag of a dog’s tail, van Haaften added. It’s more than just a meter of happiness. "A wagging tail indicates emotional arousal, not just joy.
Depending on the type, cheese isn't inherently unhealthy for dogs. But that doesn't mean it should be eaten with every meal. Like any other human food, cheese should be consumed by dogs in moderation.
They are the mammals most fully adapted to aquatic life with a spindle-shaped nearly hairless body, protected by a thick layer of blubber, and forelimbs and tail modified to provide propulsion underwater. Suborder: Mysticeti. Family: Balaenopteridae. Subfamily: Balaenopterinae. Genus: Balaenoptera. Common minke whale, Balaenoptera acutorostrata LC