Description:
#planetearth #interestingfacts #Dolphin #animals #plants #society #climate #nature #disasters Hello, you are on the planet Earth channel. Here we will look at interesting facts about our Land. Wildlife, plants, natural phenomena, and much more. Subscribe, You won't regret it! Meet dolphins - aquatic mammals of the infraorder Cetacea, belonging either to the Dolphin family (Delphinidae) — marine, or to the superfamily of river dolphins (Platanistoidea) — freshwater. Species of the Dolphin family (Delphinidae) they live in all open seas and sometimes enter the mouths of large rivers. Members of the freshwater or river Dolphin family (Platanistodea) have a much more limited distribution. For the most part, they inhabit inland fresh water bodies, although some of them can penetrate brackish estuaries and even coastal areas of the seas. The body of dolphins is perfectly adapted for movement in the water and allows them to swim very quickly. This is also helped by a very elastic and smooth skin, thanks to oily secretions that make it easier to glide in the water. Length — 2,3–3,6 m, weight — 150-300 kg. The dorsal fin, if present, is usually Crescent-shaped rather than triangular; if not curved, it is very high, like that of a male killer whale.
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