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Photo taken aboard the Chinese research vessel, "Shiyan 3," shows dolphins in the waters of the Makran Trench in the northern Indian Ocean, Jan. 15, 2018. (Xinhua/Zhang Jiansong)
Photo taken aboard the Chinese research vessel, "Shiyan 3," shows dolphins in the waters of the Makran Trench in the northern Indian Ocean, Jan. 15, 2018. (Xinhua/Zhang Jiansong)