This article presents the research’s results about morphological features of the least cisco, the round whitefish and the grayling. These species of fishes are the members of whitefishes and grayling families from Sobach’e lake’s eastern part. The local least cisco is closer to a European cisco (Coregonus albula) than to a least cisco (Coregonus sardinella) by their diagnostic features. Complete morphological data for the round whitefish and the grayling are presented. This article contains parasitological analysis on the least cisco, the round whitefish, the grayling and the European whitefish of the Sobach’e lake.