Barbatula quignardi, the Languedoc stone loach or Les stone loach,, is a species of ray-finned fish in the genus Barbatula, which belongs to the family Nemacheilidae, the stone loaches.
This loach is found in the drainage of Ebro, Bidasoa and Nervión in Spain and Lez, Tech, Adour and Garonne drainages in France.
This species reaches a length of .
The species honors ichthyologist JeanâÂÂPierre Quignard (b. 1934), then of the Marine Station at Sète and later Montpellier University, whose courtesy allowed the author to secure the type specimens.