No one saw a Mekong giant salmon carp for 15 years, but then the species was spotted in areas of Cambodia that suggest it may be found in more locations. No one saw a Mekong giant salmon carp for 15 years, but then the species was spotted in areas of Cambodia that suggest it may be found in more locations. Carp (Fish), Mekong River, Endangered and Extinct Species, Cambodia, Conservation of Resources, Biological Conservation (Journal), your-feed-science NYT > Science