‘Ghost’ fish feared to be extinct has been spotted after 20 years

A giant fish in Asia’s Mekong River that scientists believed to be extinct has been spotted three times after almost 20 years, according to a new study. The “ghost’ fish,” a large salmon carp, is renowned as the symbol of the Mekong region, Chhut Chheana, a researcher at the Inland Fisheries Research and Development Institute...