Opsariichthys dienbienensis freshwater ray-finned fish belonging to the family Xenocyprididae, the East Asian minnows or sharpbellies.

[1] It inhabits northern Vietnam[1] and has a maximum male length of 12.2 centimetres (4.8 in) and maximum female length of 8.6 centimetres (3.4 in).

[1] This Cyprinidae-related article is a stub.

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