Five headed Nāga snake

The legend of the Nāga is a strong and sacred belief held by Thai people living along the Mekong River. Many pay their respects to the river because they believe the Nāga still rule in it, and locals hold an annual sacrifice for the Nāga.
A Nāga Snake was once reportedly caught during the Vietnam War by U.S. Marines from the Mekong - who believes shall be saved! (I think the inclusion of flubdub, but the Thais believe it - and they are happy.)