In 2006, the dolphin who lived in the Yangtze River in China, was presumed extinct. In Brazil, a close cousin could reach the same end.
Fishing for piracatinga that threatens dolphins, will be suspended in Brazil
Use of dolphin baits for fishing is reported several years ago, but only now has become actions against the killing.
Gaia Noticias: Bolivian river dolphin is at risk of disappearing
Bolivia has a unique species in the country that lives in lakes and rivers of the Amazon.
BBC: Return of pink dolphins to the Amazon
The severe drought experienced by the Amazon in 2010 halved the amount of pink dolphins. But now the species is recovering.