Pao turgidus[2] is a species of freshwater pufferfish native to the Mekong basin (Cambodia, Laos, Thailand, Vietnam).

It may also occur in the Chao Phraya basin in Thailand.

[1] This species grows to a length of 18.5 centimetres (7.3 in) SL.

In Cambodia, poisonings caused by eating pufferfish caught from lakes and rivers are common and sometimes result in fatalities.

The toxin, primarily saxitoxin, is likely acquired through food, and mostly accumulates in the skin.