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The only available study offering economic perspective on Yangtze finless porpoises (YFPs) and the environmentally sensitive Poyang Lake, the largest freshwater lake as well as the last basin of clean water in China. §Yangtze finless porpoises are the only fresh-water porpoises in the world, their habitat confined to the Yangtze River system, including Poyang Lake. This is the only publication to assess their threatened economic value using the contingent valuation method.§