Knipowitschia mrakovcici is a species of freshwater goby Endemic to the Krka River catchment in Croatia where it is only found in lakes. Males of this species can reach a length of SL while females only reach SL. The specific name honours the Croatian biologist Milorad MrakovÃÂiÃÂ of the University of Zagreb, who provided the author, Peter J. Miller, with the original type material.