This species is distinguished from other species of the O. angorae group by the following characters, none of which are unique: differs from O. anatolicus and O. angorae by having the pre-dorsal back with blotches or a dark-brown, fine, mottled pattern, without saddles (vs. pre-dorsal back usually with 3-4 saddles), with a few isolated scales on the flank in front of the dorsal-fin origin (vs. flank completely covered by scales), caudal peduncle depth 1.5-1.9 times in its length (vs. 1.3-1.6 in O. anatolicus); this species with the flank usually with large, isolated, irregularly set and shaped blotches forming a marbled pattern (vs. flank with small and confluent, regularly set and shaped blotches and spots forming a marbled or mottled pattern in O. anatolicus while flank with a midlateral series of blotches usually fused to a stripe in O. angorae), and no depigmented stripe along the anterior part of the lateral line (vs. usually present in O. angorae) (Ref. 131061).