Photos: Few Remaining River Dolphins Indicators of River, Human Health

National Geographic: The Yangtze finless porpoise is one of two large marine mammals that used to ply China's longest river. It has outlived the now extinct Yangtze river dolphin, which was last seen in 2007. Just 1,600 to 1,800 of the finless porpoises were counted in 2006 along the middle Yangtze and in two lakes. A population of the porpoise that has been protected in one of the Yangtze's oxbow lakes--remnants of where the river used to run--has grown by three or four calves a year. To ......

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