Ceratoperidinium is a very rare dinoflagellate genus reported from both the western and the eastern Mediterranean Sea. While Ceratoperidinium yeye had been collected from the Bay of Palma de Mallorca, C. cf. yeye from the Alborán Sea, C. yeye and C. mediterraneum from Lebanese coastal waters, and Ceratoperidinium sp. from the Bay of Palma de Mallorca, this paper reports on the first occurrence of the dinoflagellate C. yeye in the Adriatic Sea. There are very scarce data about this species in literature.Dinoflagelat Ceratoperidinium veoma se rijetko javlja. Zabilježen je u Sredozemnom moru i to Ceratoperidinium yeye u zaljevu Palma de Mallorca, C. cf. yeye u Alboránskom moru, C. yeye i C. mediterraneum u Libanonskim obalnim vodama i Ceratoperidinium sp. u zaljevu Palma de Mallorca. U radu su iznesene lokacije i opisani ekološki uvjeti pri kojima su zabilježeni prvi nalazi vrste C. yeye u istočnom dijelu Jadrana
