''Poropuntius angustus'' is a species of

cyprinid Cyprinidae is a family of freshwater fish commonly called the carp or minnow family. It includes the carps, the true minnows, and relatives like the barbs and barbels. Cyprinidae is the largest and most diverse fish family and the largest verte ...

fish. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to the

Mekong Basin The Mekong or Mekong River is a trans-boundary river in East Asia and Southeast Asia. It is the world's twelfth longest river and the third longest in Asia. Its estimated length is , and it drains an area of , discharging of water annuall ...

and is currently only known from a few tributaries of Mekong in

Laos Laos (, ''Lāo'' )), officially the Lao People's Democratic Republic ( Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ, French: République démocratique populaire lao), is a socialist ...

(

Nam Ou The Nam Ou ( Laotian: ນ້ຳອູ , literally: "rice bowl river") is one of the most important rivers of Laos. It runs 448 km from Phongsaly Province to Luang Prabang Province. The river rises in Muang Ou Nua near the Lao-Chinese border, a ...

, Nam Tha and Nam Youan). It grows to SL. It lives mainly in small forest streams.

References

angustus Fish of the Mekong Basin Fish of Laos Endemic fauna of Laos Fish described in 2000 Taxa named by Maurice Kottelat {{Cyprininae-stub