Pangasianodon Hypopthalmus
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''Pangasianodon'' is a genus of large to very large shark catfishes native to the
Mekong The Mekong or Mekong River is a trans-boundary river in East Asia and Southeast Asia. It is the world's List of rivers by length, twelfth longest river and List of longest rivers of Asia, the third longest in Asia. Its estimated length is , ...
and
Chao Phraya River The Chao Phraya ( or ; th, แม่น้ำเจ้าพระยา, , or ) is the major river in Thailand, with its low alluvial plain forming the centre of the country. It flows through Bangkok and then into the Gulf of Thailand. Et ...
s in
Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical United Nations geoscheme for Asia#South-eastern Asia, south-eastern region of Asia, consistin ...
and adjacent China.


Species

Two species in this genus are recognized: * '' Pangasianodon gigas'' Chevey, 1931 (Mekong giant catfish) * '' Pangasianodon hypophthalmus'' ( Sauvage, 1878) (iridescent shark) Despite local protection and quite widespread awareness of the giant catfish and its critically endangered status, the species is gravely threatened by the build-out of hydroelectric dams on the Mekong River and its tributaries, and by fishing. Though the species is being propagated in Thailand, Thai stock is reported to be contaminated by hybridization with ''P. hypophthalmus'', with hybrids having been carelessly released into the wild. Cambodia currently offers the best opportunities for conservation intervention through dovetailed efforts in captive propagation, reintroduction, and habitat protection. The striped catfish ''P. hypophthalmus'' - well known to home aquarists as the "iridescent shark"- is endangered in the wild, yet is mass-produced in aquaculture and readily available both as an aquarium fish and as fillets through most of the developed world. While still considerably more common in the wild than its immense sister species, like it, ''P. hypophthalmus'' merits a field-based conservation program in Cambodia. Recent field work has begun to reveal some of the secrets of pangasiid catfishes, including these two species. However omnipresent as commodities in the wealthier nations, the two'' Pangasianodon'' species remain astonishingly little known as important components of the Mekong basin's rich but greatly threatened living heritage.


References

{{Taxonbar, from=Q1755124 Pangasiidae Fish of Asia Catfish genera Freshwater fish genera