Description: In the present work the genetic-biochemical analyses of transferins and hemoglobins of the Black Sea turbot from different localities (the ''Drill'' area, the Cape Emine and the mouth of Kamtchiya River) were carried out. Two different electrophoretical methods - starch gel electrophoresis and isoelectric focusing (IEF) are applied. Up to now the Black Sea turbot population structure is not studied, which is the mark for the significance of the problem we investigated. The main goal of the study is to found genetic-biochemical markers for the Black Sea turbot and genetical characteristic of this very valuable fish species