Kessler's gudgeon, Romanogobio kessleri, is a species of ray-finned fish in the family Cyprinidae.

There are no scales on the throat and this helps distinguish it from its close relative, Kessler's gudgeon (Romanogobio kessleri).

Romanogobio kesslerii (Kessler's gudgeon)

Kessler's gudgeon is gregarious and feeds on invertebrates that lie on the river bed and prey that drifts past on the current.

Kessler's gudgeon is listed as of "Least Concern" by the IUCN Red List of Threatened Species.

Kessler's gudgeon is found in rivers and streams in the Danube basin and favours stretches of fast-flowing water with sandy bottoms where the gradient begins to ease off at the foot of the mountains.