New data for invasive pilengas mullet species Liza haematocheila, (Temminck and Schlegel, 1845) along Bulgarian Black Sea coast.Liza haematocheila(Temminck & Schlegel) (syn. Mugil soiuyBasilewsky)is an invasive mugilid species, native to the Amu Darya River basin. After numerous introduction attempts to support commercial fisheries, this species established a successful breeding population in the Sea of Azov during the early 1980s. This invasive species expanded its areal of distribution and has been recorded for north-eastern Black Sea, Turkish coast, Aegean Sea and Western Meditteranean. The present study covered new data for morphometrical and meristic characteristics of the speciemens caught along Bulgarian Black Sea coast as well as genetic-biochemical evidence for species identification.