Mystacoleucus obtusirostris

{{Short description|Species of fish}}

{{Speciesbox

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Ahmad, A.B. |date=2020 |title=Mystacoleucus obtusirostris |volume=2020 |page=e.T89821023A89821039 |doi=10.2305/IUCN.UK.2020-2.RLTS.T89821023A89821039.en |access-date=18 November 2021}}

| taxon = Mystacoleucus obtusirostris

| authority = (Valenciennes, 1842)

| synonyms = *Barbus marginatus Valenciennes, 1842

• Systomus marginatus (Valenciennes, 1842)
• Barbus obtusirostris Kuhl & van Hasselt, 1823
• Barbus obtusirostris Valenciennes, 1842
• Mystacoleucus marginatus Valenciennes, 1842
• Puntius siamensis Sauvage, 1883

}}

Mystacoleucus obtusirostris is a species of ray-finned fish, found in freshwater habitats in Southeast Asia, notably in Thailand in the Mekong River, Chao Phraya River, and Mae Klong River. It is exploited in subsistence fishing.