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River dolphins are rather small, ranging in size from the 5-foot (1.5 m) long South Asian river dolphin to the 8-foot (2.4 m) and 220-pound (100 kg) Amazon river dolphin. They all have female-biased sexual dimorphism apart from Amazon river dolphin, with the females being larger than the males.
The Amazon river dolphin is the largest species of river dolphin, with many adult males reaching 185 kilograms (408 lb) in weight, and 2.5 metres (8.2 ft) in length. Adults acquire a pink color, more prominent, in males, giving it its nickname "pink river dolphin".
The species is also called the Chinese river dolphin, ... The book by the same name, published in 1990, included pictures of the captive specimen.
The Ganges river dolphin split from the Indus river dolphin during the Pleistocene, around 550,000 years ago. [1] The earliest fossil identified as belonging to the species is only 12,000 years old. [12] The Ganges river dolphin was formally classified as Delphinus gangeticus two separate times in 1801, by Heinrich Julius Lebeck [13] and ...
Bones from an Amazon pink river dolphin are embedded in dried mud along the banks of Lake Tefé in Tefe, Brazil, on Oct. 31, 2023. More than 200 river dolphins died in the 2023 drought that sent ...
South Asian river dolphins are toothed whales in the genus Platanista, which inhabit the waterways of the Indian subcontinent.They were historically considered to be one species (P. gangetica) with the Ganges river dolphin and the Indus river dolphin being subspecies (P. g. gangetica and P. g. minor respectively).
A rare pink dolphin spotted in Louisiana last week may be a female albino named “Pinky” by locals. Houston man Thurman Gustin was fishing at Old River Pass in Cameron Parish, Louisiana, on 12 ...
There are two types of freshwater dolphins found throughout the Amazon: the Amazon River dolphin – or “pink dolphins” due to their color – and the smaller tucuxi, Trujillo said.