 Although, the species has been absent in subsequent studies in the Adriatic, suggesting a possible extinction of that species in the area.However, recent studies, done by Lipej in 2004, show that some juveniles have been caught in the central Adriatic.Also, some data collected during the surveys in the Balearic Sea and the Ionian Sea found one specimen at 800 m in the western Ionian Sea, suggesting that the population of "O. centrina", in the east-central Mediterranean, has an unknown population.