Mekong Irrawaddy dolphins swim in the Mekong River in Kratie province, Cambodia, on March 9, 2025. The Mekong Irrawaddy dolphins have been listed as critically endangered on the International Union for Conservation of Nature (IUCN) Red List of Threatened Species since 2004. Photo: Xinhua

Mekong Irrawaddy dolphins swim in the Mekong River in Kratie province, Cambodia, on March 8, 2025. The Mekong Irrawaddy dolphins have been listed as critically endangered on the International Union for Conservation of Nature (IUCN) Red List of Threatened Species since 2004. Photo: Xinhua

People are on a tour to visit Mekong Irrawaddy dolphins in Kratie province, Cambodia, on March 8, 2025. The Mekong Irrawaddy dolphins have been listed as critically endangered on the International Union for Conservation of Nature (IUCN) Red List of Threatened Species since 2004. Photo: Xinhua

Mekong Irrawaddy dolphins swim in the Mekong River in Kratie province, Cambodia, on March 8, 2025. The Mekong Irrawaddy dolphins have been listed as critically endangered on the International Union for Conservation of Nature (IUCN) Red List of Threatened Species since 2004. Photo: Xinhua