The Mekong giant catfish is a species of catfish in the shark catfish family. It is grey to white in colour and is distinguished by the near-total lack of barbels and the absence of teeth.
Habitat and Ecology
The Mekong giant catfish is the largest freshwater fish and is endemic to the Mekong River. It migrates huge distances to spawn.
Population and Distribution
It is now only found in the mainstream of the Lower Mekong in Myanmar, Lao PDR, Thailand, Cambodia and Vietnam. It used to be relatively common further north along the Thai-Lao PDR border but is now extremely rare in this area.
Scientists estimate that the total number of Mekong giant catfish have decreased by around 90% in the last decade. No population figures are available, and estimates of the decline are based on the fall in the number of specimens caught, Some experts believe there may only be a few hundred Mekong giant catfish surviving.
What are the main threats?
Threats to the Mekong giant catfish, and several other giant migratory fish species in the Mekong, include infrastructure development
such as dams that block migration routes and isolate some populations. Without the ability to move up and down rivers, the fish have fewer opportunities to breed.
Navigation projects have also destroyed critical spawning grounds and pollution and siltation have also had an impact.
A further major factor in the decline of the Mekong giant catfish is over-fishing