Taxonomically and behavioral difference of Pla Buk, Pangasianodon gigas Chevey and Pla Swai, Pangasius sutchi Fowler fingerling
1984
Wanpen Meenakarn (Department of Fisheries, Bangkok (Thailand). National Inland Fisheries Inst.)
Pla Buk or Mekong giant catfish Pangasianodon gigas Chevey is the biggest freshwater catfish in the world and found only in the Mekong river. Pla Buk and Pangasius sutchi are in the same family and used to be grouped in the same genus. Until 1930 Chevey named the new genus for Pla Buk because the adult is much larger than P. sutchi, toothless, no denticulate serrated spine, eyes below the mouth level, and feed on algae. At present study showed that fingerling of both species are very similar. Both fishes have, denticulate serrated spine on dorsal and pectoral fins, eyes and mouth are at the same level, and omnivorous. Both species are slightly different in size and shape of caudal fin.
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