River dolphin

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River dolphins are a very widespread group of fully aquatic mammals that reside exclusively in freshwater or brackish water. They are an informal grouping of dolphins, which is a paraphyletic group within the infraorder Cetacea. The river dolphins comprise the extant families Platanistidae (the Indian dolphins), Iniidae (the Amazonian dolphins), and Pontoporiidae (the brackish dolphins). There are five extant species of river dolphins, and two subspecies.

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Amazon-river-dolphin.jpgAmazon river dolphin GangesriverdolphinCollectA-11.jpgGanges river dolphin

Amazon river dolphin

phylum Chordata The Amazon river dolphin, or Boto, is a freshwater river dolphin endemic to the Orinoco, Amazon and Araguaia/Tocantins River systems of Brazil, Peru, Bolivia, Ecuador, Colombia, and Venezuela. Although not a large cetacean in general terms, this dolphin is the largest freshwater cetacean; it can grow larger than a human.


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class Mammalia
infraclass Eutheria
order Cetacea
suborder Odontoceti
family Iniidae
genus Inia
species I. geoffrensis

Ganges river dolphin

phylum Chordata The South Asian river dolphin is a freshwater or river dolphin found in India, Bangladesh, Nepal and Pakistan which is split into two subspecies, the Ganges river dolphin and Indus river dolphin. The Ganges river dolphin is primarily found in the Ganges and Brahmaputra Rivers and their tributaries in Bangladesh, India and Nepal. From the 1970s until 1998, they were regarded as separate species; however, in 1998, their classification was changed from two separate species to subspecies of a single species (see taxonomy below). The Ganges river dolphin has been recognized by the government of India as its National Aquatic Animal.


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class Mammalia
infraclass Eutheria
order Cetacea
suborder Odontoceti
family Platanistidae
genus Platanista
species P. gangetica