“…Since then, new species have been recorded in the Hellenic Seas (Kondylatos et al, 2018;Dragičević et al, 2019;Kousteni et al, 2019;Küpper et al, 2019;Giovos et al, 2020;Karachle et al in Bariche et al, 2020;Angelidis & Polyzoulis, 2018;Manousis et al, 2020;Pirkenseer, 2020;Ragkousis et al, 2020;Zenetos & Miliou, 2020;. In addition, several NIS have extended their distribution range northwards (Aegean Sea) (Gerovasileiou et al, 2017;Kondylatos & Corsini-Foka, 2017;Lipej et al, 2017;Ulman et al, 2017;Chartosia et al, 2018;Manousis et al, 2018) and westwards (Ionian Sea) (Yokeş et al, 2018;Dimitriadis et al, 2019Dimitriadis et al, , 2020Pirkenseer, 2020). Unaided natural dispersal of NIS previously introduced elsewhere in the Mediterranean (58%) and transport-stowaway (37.1%) were identified as the major pathways of introduction for the new NIS introduced into Hellenic waters (Zenetos et al, 2018), following similar patterns to those observed in the Eastern Mediterranean Sea (Katsanevakis et al, 2013;Armon & Zenetos, 2015).…”