In this study, the relationships between otolith length and fish length (total, fork and standard) of a total of 251 specimens of the Capoeta capoeta umbla (Heckel, 1843) (Cyprinidae) species inhabiting Hazar Lake were examined.The otolith lengths were measured for the whole otolith (in an anterior to posterior direction) by using an ocular microscope with a micrometer.There was a strong relationship between the otolith lengths and fish lengths obtained.