First documented report on the Lessepsian migrant Etrumeus teres De Kay, 1842 (Pisces: Clupeidae) in the Greek Seas ARGYRIS KALLIANIOTIS* and VASILIS LEKKAS Fisheries Research Institute, N.AG.RE.F. 64007, Nea Peramos, Kavala, Greece Abstract In this study, the presence of the Lessepsian migrant red-eye round herring (Etrumeus teres) is validated in the Greek Seas with the capture of large quantities by purse seiners during May 2004, in the Cyclades Islands. This species is recorded for the first time in the Southern Aegean Sea, although fishermen reported that it has been caught repeatedly during the last five years in the same area. Morphometric and meristic characteristics of the species are described and two biological parameters are estimated (i.e. the length-weight relationship and the reproductive maturity).   < back .