Pangasianodon gigas, n, 19

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Mekong Giant Catfish (Pangasianodon gigas) is Critically Endangered. This species is one of the world's largest freshwater fish, found only in the lower Mekong River Basin. The population has declined by more than 80% over the last 13 years, mainly through over-exploitation and habitat loss and degradation. Increasing siltation of the river through past deforestation practices and obstruction of migratory routes through the construction of dams in the region may also have a negative impact on fish abundance in the river. Photo © Zeb S. Hogan.