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In animals with four flippers, such as pinnipeds and sea turtles, one may distinguish fore-and hind-flippers, or pectoral flippers and pelvic flippers. [2] [3] Animals with flippers include penguins (whose flippers are also called wings), cetaceans (e.g., dolphins and whales), pinnipeds (e.g., walruses, earless and eared seals), sirenians (e.g ...
Fully aquatic mammals and animals typically have flippers instead of webbed feet, which are a more heavily specialized and modified limb. [2] It is hypothesized that an evolutionary transition between semiaquatic and fully aquatic higher vertebrates (especially mammals) involved both the specialization of swimming limbs and the transition to ...
Pinnipeds have two pairs of flippers on the front and back, the fore-flippers and hind-flippers. Their elbows and ankles are not externally visible. [ 35 ] Pinnipeds are not as fast as cetaceans , typically swimming at 5–15 kn (9–28 km/h; 6–17 mph) compared to around 20 kn (37 km/h; 23 mph) for several species of dolphin .
The majestic Emperor Penguin is most renowned for being the largest penguin species in the glacial habitat of Antarctica, widely recognized by the yellow patch on their neck. These endearing birds ...
Aquatic turtles have webbed feet or flippers – to help propel them through the water. ... Even in the wild, their shell means they are less vulnerable to predators than many other animals, so ...
The flippers of penguins have at least three branches of the axillary artery, which allows cold blood to be heated by blood that has already been warmed and limits heat loss from the flippers. This system allows penguins to efficiently use their body heat and explains why such small animals can survive in the extreme cold. [55]
Humpback Whales are one of the largest weighing animals of the world, yet they are profound swimmers, which attributes down to its flippers (fins). They have warty ridges on the front edge of ...
The dugong (/ ˈ d (j) uː ɡ ɒ ŋ /; Dugong dugon) is a marine mammal.It is one of four living species of the order Sirenia, which also includes three species of manatees.It is the only living representative of the once-diverse family Dugongidae; its closest modern relative, Steller's sea cow (Hydrodamalis gigas), was hunted to extinction in the 18th century.