The giant salmon carp, once thought to be extinct in the Mekong River, has been spotted again after almost 20 years. Known for its large size, knob on its lower jaw, and yellow patch around its eyes, the fish was last officially seen in 2005. Recent reports from the Mekong River and a nearby tributary have confirmed sightings since 2020. These discoveries were made thanks to biologists working with local fishermen to find the species. So far, three individuals have been found, offering hope for its study and protection. However, the giant salmon carp’s survival is still at risk. Industrial pollution, overfishing, and the construction of over 700 dams in the Mekong basin have damaged its migration routes. Experts are concerned about the lack of fish migration passages in the dams. Biologists are collaborating with communities in Cambodia, Thailand, and Laos to search for the fish in other parts of the river. This international effort is essential for protecting the species long term.