Yangtze river dolphin is almost certainly extinct
[...] The researchers warn that a similar fate could await a subspecies of the finless porpoise Neophocaena phocaenoides, which only lives in the Yangtze and is already extremely rare.
They say the extinction of the Baiji "merely reflects the latest stage in the progressive ecological deterioration of the Yangtze region, home to approximately 10% of the world’s human population". During their expedition they noted more than one large fishing boat for every 100 metres of river.
The world's most endangered cetacean is now the Gulf of California porpoise Phocoena sinus, or "vaquita", of which a few hundred remain. It is also threatened by accidental by-catch.[...]
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