The morphometric characters of Muraenolepis (commonly identified as M. microps) were studied. It was found a small relevance of features accepted so far as diagnostic: dorsal filament length, mental barbel length and eye diameter. The length of lateral line exceeds that in individuals of M. microps described so far in the available literature, reaching far beyond the anus. Its chord length being on average 49.66% of L. Stand., indicates to M. marmoratus presumably.
The present paper evaluates the relevance of otoliths, vertebrae and other osseous elements to the age determinations; the age composition of stock, growth rate, length-weight relationship, condition, stage of gonads maturity as well as the age at first maturity were investigated, too.
Body length-dependent variability of the 5 following characteristics, commonly regarded as diagnostic, was studied: head length, maximum body depth, interorbital distance, horizontal eye diameter, and snout length. Ray counts in the dorsal, anal, and pectoral fins were analysed. Skeletal bones were described in detail, based on material from 3 individuals. The data obtained served to extend the species description. Functional and evolutionary importance of variability in the characters studied was analysed.