Petruichthys is a genus of stone loaches native to eastern Asia.

The genus is not universally accepted as valid and the two species placed there have been placed in other genera.

There are currently two recognised species in this genus:[2] P. salmonides has been regarded as a species inquirenda[3] but Eschmeyer's Catalog of Fishes treats it as a valid recognised species within Petruichthys.

[2] This Nemacheilidae article is a stub.

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