Description: The relationships among 15 morphometric measurements and carcass weight in European perch (Perca fluviatilis) were examined in connection with sexual dimorphism. The determinated sex ratio was 1:1.3 in the advantage of the male sex. The female perch were larger than male perch by 20,7 percentage, but the carcass weight of the male specimens was by 4,7 percentage better in comparison with the ones measured in female specimens