Unfortunately, scientists failed to find a single Yangtze river dolphin in its natural habit, leading them to conclude that it was "functionally extinct."
According to the article I provided, pollution and overfishing were the main reasons for the Dolphin's extinction, and while I wouldn't call it "On Purpose," it is still just as tragic.
Source(s):
http://www.newscientist.com/article/dn12434

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