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DOI : 10.17693/yunusae.v15i21958.235748 Viewed : 3129 - Downloaded : 1749 Mediterranean Horse Mackerel (Trachurus mediterraneus), one of the important species for Black Sea, was investigated in order to illustrate different aged otoliths` (0-5) morphology and some ring characters. This research was carried out with 4265 otoliths which were sampled from the regions have an intensive commercial fishing between Ordu and Rize. It was conducted otolith shape analyses FF, RD, AR. Four different otolith types according to their morphological features were fixed. Mediterranean Horse Mackerel has a complicated otolith structure that is relatively difficult to interpret the age, for this reason false ring, larval stage rings and similar formations were considered. Besides, different type of otoliths and some structural defected ones were presented with photographs. Keywords : Mediterranean horse mackerel,otolith,Trachurus mediterraneus,Black Sea