Narrow-ridged finless porpoise may refer to one of two species in the genus ''Neophocaena'':
* the
East Asian finless porpoise
The East Asian finless porpoise (''Neophocaena sunameri'') is a species of porpoise native to the East China Sea, Yellow Sea, and the seas around Japan. The Yangtze finless porpoise (''N. asiaeorientalis'') was formerly considered a subspecies ...
(''N. sunameri'')
* the
Yangtze finless porpoise
The Yangtze finless porpoise (''Neophocaena asiaeorientalis'') is a species of toothed whale in the family Phocoenidae. It is endemic to the Yangtze River in China, making it the country's only known freshwater cetacean following the possible ext ...
(''N. asiaeorientalis'')
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Animal common name disambiguation pages