Zingel asper, also known as the Rhone streber, is a species of freshwater ray-finned fish in the family Percidae that is at a high risk of becoming extinct due to habitat destruction and pollution.

It is endemic to the rivers Durance and Beaume in the Rhône basin in France and Switzerland.

It lurks on the stone bottoms of fast-flowing rivers in the day, coming out at night to feed on aquatic vertebrates.

Spawn is deposited on gravel and the eggs stick to the substrate and hatch in about fourteen days.

The subpopulations in the Durance, with 200 fish per hectare, and the Beaume, with 80 fish per hectare, are relatively stable, but the Drôme population is small and the population in the river Doubs is estimated to number between 80 and 160.