Photo credit: Wanna Thawinwan (Thailand) Review: Abdel Rahman El Gamal General: The Mekong giant catfish, Pangasianodon gigas is the world’s largest freshwater fish which is native to the Mekong River basin in Southeast Asia. It is also called giant Mekong catfish and also “Pla Beuk” in the Thai language. There are records about specimens of the …