The Miscellany of Mekong River

Balls of light are observable from time to time rising from the water's surface in the stretch of the river near Vientiane or Nong Khai. These are sometimes referred to as Naga fireballs. The locals attribute the phenomenon to Phaya Naga, Mekong Dragons.

According to researchers the river houses more species of giant fish than any world river[2], most notably the Giant Mekong Catfish.

The low tide level of the river in Cambodia is lower than the high tide level out at sea, and the flow of the Mekong inverts with the tides throughout its stretch in Vietnam and up to Phnom Penh. The very flat Mekong Delta area in Vietnam is thus prone to flooding, especially in the provinces of An Giang and Dong Thap (Đồng Tháp), near the Cambodian border.

A South- and Southeast Asian regional association, the Mekong-Ganga Cooperation, is named after both this river and the Ganges river.