It was aimed to investigate sagittal otolith mass asymmetry Sardina pilchardus sampled from Aegean, Marmara and Mediterranean seas of Türkiye in present study. In this study, differences between right left otoliths were statistically significant for (P<0.05) not Aegean Sea, (P˃0.05). The mean values (X) found 0.0393 0.0144 according Sea respectively. addition, absolute │X│ calculated as 0.03...