WHOI researchers and collaborators gave hearing exams to two Yangtze finless porpoises at the Institute of Hydrobiology, Chinese Academy of Sciences to learn more about how these porpoises receive sound and how sensitive they are to various frequencies. The porpoises live in one of the world’s busiest waterways, the Yangtze River in China, where shipping, dredging, and underwater construction is constant. (Photo by Aran Mooney, Woods Hole Oceanographic Institution)

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WHOI researchers and collaborators gave hearing exams to two Yangtze finless porpoises at the Institute of Hydrobiology, Chinese Academy of Sciences to learn more about how these porpoises receive sound and how sensitive they are to various frequencies. The porpoises live in one of the world’s busiest waterways, the Yangtze River in China, where shipping, dredging, and underwater construction is constant. (Photo by Aran Mooney, Woods Hole Oceanographic Institution)