The largest species of catfish is the Mekong giant catfish (Pangasianodon gigas). Native to the Mekong River Basin in Southeast Asia, this fish can grow up to 3 meters (10 feet) in length and weigh over 300 kilograms (660 pounds). Despite its massive size, it is currently endangered due to overfishing, habitat loss, and dam constructions. Conservation efforts are underway to protect this species and its natural habitat. Their diet mainly consists of plankton, plants, and small fish, and they play an essential role in the ecosystems of the rivers they inhabit.