This photo, taken at an unknown time and shared by Chhut Chheana, shows a giant salmon carp that was recently found again in Cambodia. AP Photo
In a remarkable turn of events, a large fish species once believed to be extinct has been spotted three times in the Mekong River over the past few years. Known as the giant salmon carp, this fish has become a symbol of the Mekong region, as noted by Chheana Chhut, a researcher at the Inland Fisheries Research and Development Institute in Phnom Penh, Cambodia.
The giant salmon carp can reach lengths of up to 4 feet (1.2 meters) and is easily recognized by the prominent knob at the tip of its lower jaw. Its striking appearance is further highlighted by the bright yellow patch around its large eyes. These unique features have captured the interest of researchers and locals alike.
The last confirmed sighting of this species was in 2005, leading many to believe it had disappeared from the Mekong region for years. However, Chheana, a co-author of a recent study published in the journal Biological Conservation, shared that the rediscovery of this fish is both exciting and significant. The recent sightings, occurring between 2020 and 2023, were made possible through efforts by biologists who have been collaborating with local fishing communities in Cambodia. By asking these communities to report any unusual fish sightings, researchers were alerted to the presence of three giant salmon carp.
“I was really surprised and excited to see the real fish for the first time,” said Bunyeth Chan, a researcher at Svay Rieng University and co-author of the study. His enthusiasm reflects the hope that these sightings bring for the future of the species, which is often referred to as “ghost fish.”
In this photo, shared by Chhut Chheana, a researcher is seen holding a giant salmon carp, known as Aaptosyax grypus, which was recently found again in Cambodia. AP Photo
The news of the giant salmon carp's rediscovery is a breath of fresh air for conservationists and researchers, especially given the numerous threats facing migratory fish in the Mekong River. Industrial pollution and overfishing have taken a toll on aquatic life in the region. In addition, more than 700 dams constructed along the river and its tributaries pose significant challenges for fish navigation, as there are few effective “fish passages” to help them overcome these barriers. Brian Eyler, director of the Southeast Asia Program at the Stimson Center, emphasized the urgency of the situation, pointing out that these factors put all migratory species in jeopardy.
The researchers are optimistic about the future of the giant salmon carp. By building partnerships with local communities in Thailand and Laos, they hope to confirm whether the fish still swims in other sections of the Mekong River. Such collaboration could provide crucial insights into the distribution of this elusive species and help develop strategies for its conservation.
The sightings of the giant salmon carp serve as a reminder of the importance of preserving the delicate ecosystems within the Mekong River. Conservation efforts, coupled with community involvement, may provide a pathway to safeguarding not just this remarkable fish but also the diverse aquatic life that calls the river home.
