Six critically endangered Mekong giant catfish — one of the largest and rarest freshwater fish in the world — were caught and released in Cambodia recently in just a few days, offering new hope for the survival for the species.

The catching of six rare giant catfish in Cambodia in the space of five days, some weighing more than 120 kg (265 lbs), has raised hopes of a revival of a critically endangered species that is among the world's largest freshwater fish.

Fishermen in Cambodia have been having a streak of good luck lately. Researchers say they caught three Mekong giant catfish, one of the rarest and largest freshwater fish in the world. These fish, when caught,