Mekong giant catfish

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Mekong giant catfish

Scientific classification

Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Siluriformes
Family:	Pangasiidae
Genus:	Pangasianodon
Species:	P. gigas

Binomial name

Pangasianodon gigas
Chevey, 1931

The Mekong giant catfish, Pangasianodon gigas, is a species of freshwater fish in the shark catfish family (family Pangasiidae) of order Siluriformes, native to the Mekong basin in Southeast Asia. It is the only species of genus Pangasianodon Chevey, 1931. Some sources list this fish under the genus Pangasius.^[1]

Endemic to the lower half of the Mekong river, this catfish is in danger of extinction due to overfishing, as well as the decrease in water quality due to development and upstream damming. The current IUCN Red List for fishes classes the species as Critically Endangered; while the number of individuals living in the wild is not known, catch data indicate that the population has fallen by 80 percent in the last 13 years.^[2] ^[3] It is also listed in Appendix I of CITES, banning international trade.^[4] Fishing for the Mekong giant catfish is illegal in Thailand, Laos, and Cambodia, but the bans appear to be ineffective, with the fish continuing to be caught in all three countries.^[2] However, in recognition of the threat to the species, nearly 60 Thai fishermen agreed to stop catching the endangered catfish in June 2006, to mark the 60th anniversary of Bhumibol Adulyadej's accession to the throne of Thailand.^[5]

Attaining an unconfirmed length of 3 m, the Mekong giant catfish grows extremely quickly, reaching a mass of 150 to 200 kg in only six years.^[6] The largest catch recorded in Thailand since record-keeping began in 1981 was a female measuring 2.7 m (roughly 9 feet) in length and weighing 293 kg (646 lb). This specimen, caught in 2005, is widely recognized as the largest freshwater fish ever caught. Thai Fisheries officials stripped the fish of its eggs as part of a breeding programme, intending then to release it, but the fish died in captivity and was sold as food to local villagers.^[7] ^[8] ^[9]

Grey to white in colour and lacking stripes, the Mekong giant catfish is distinguished by the near-total lack of barbels and the absence of teeth.^[6]

In Laos, it is called pa beuk, and is the most highly-esteemed fish in Lao cuisine. In former times, specific rites were associated with the catch of these fish, which was conducted once yearly. Rarely is the fish available in markets.^{[citation needed]} Food writer Alan Davidson describes its flesh with words like "superlative", "admirable texture and unmatched flavour", and "subtle and majestic".^{[citation needed]} The liver is a delicacy and the pickled roe of the females provide "Laotian caviar".^{[citation needed]}

It is also known as pla buk, pla ma fai, pla nang, or pla hua kum hang hum (Thai); cá tra dầu (Vietnamese); and trey réach (Khmer). Some sources consider P. gigas to be a member of genus Pangasius, but the chief authorities classify it in its own genus, Pangasianodon. Pangasius paucidens Fang & Chaux, 1949 is an old junior synonym.^[6]