Giant salmon carp

The giant salmon carp, also termed the Mekong giant salmon carp, is a species of freshwater fish in the family Cyprinidae and the single species in the monotypic genus Aaptosyax. It is endemic to the middle reaches of the Mekong River in northern Cambodia, Laos, and Thailand. Its population is much reduced as a result of overfishing and habitat degradation, and it is now considered Critically Endangered.
This fish can reach a length of and weight of. Between 2004 and 2022 no confirmed sightings of adult individuals of this species were made, until a specimen was found at a fish market in Cambodia.