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August 05, 2013 - Champasak (Laos). Fish caught in the Si Phan Don channel are sold at the local market of Nakasang. Experts say that the construction of the Don Sahong's dam will put at risk the ecological integrity of the Lower Mekong as a whole. In particular, it will have a severe impact on the endangered giant catfish, other fish species — some of them unique to the Mekong — and the Irrwaddy dolphin, which has found a natural habitat just two kilometers from the dam and is already critically endangered. © Thomas Cristofoletti / Ruom