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River dolphins are a polyphyletic group of fully aquatic mammals that reside exclusively in freshwater or brackish water.They are an informal grouping of dolphins, which itself is a paraphyletic group within the infraorder Cetacea.
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".
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 ...
The Amazon river dolphins, many of a striking pink color, are a unique freshwater species found only in the rivers of South America and are one of a handful of freshwater dolphin species left in ...
The Araguaian river dolphin (I. araguaiaensis) is a newly identified species native to the Araguaia-Tocantins basin of Brazil. [2] The La Plata dolphin (Pontoporia blainvillei), another vulnerable Brazilian denizen, is a marine river dolphin that ranges from Espírito Santo, Brazil, to the south. [3] Suborder Odontoceti. Superfamily Delphinoidea
Venturing deep into the complex waterways of the Amazon, Colombian marine biologist Fernando Trujillo first set out to study the mysterious pink river dolphin in 1987, at the directive of the late ...
Articles relating to the river dolphins, a polyphyletic group of fully aquatic mammals that reside exclusively in freshwater or brackish water. They are an informal grouping of dolphins, which itself is a paraphyletic group within the infraorder Cetacea. Extant river dolphins are placed in two superfamilies, Platanistoidea and Inioidea.
The baiji (Lipotes vexillifer), is a possibly extinct species of freshwater dolphin native to the Yangtze river system in China. It is thought to be the first dolphin species driven to extinction due to the impact of humans.