Management of Biological Invasions (2018) Volume 9, Issue 3: 209–226 DOI: https://doi.org/10.3391/mbi.2018.9.3.04 Open Access © 2018 The Author(s). Journal compilation © 2018 REABIC Review Deep cleaning of alien and cryptogenic species records in the Greek Seas (2018 update) Argyro Zenetos1,*, Maria Corsini-Foka2, Fabio Crocetta1,3, Vasilis Gerovasileiou4, Paraskevi K. Karachle1, Nomiki Simboura5, Konstantinos Tsiamis6 and Maria-Antonietta Pancucci-Papadopoulou5 1Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research, Anavyssos, 19013 Greece 2Institute of Oceanography, Hellenic Centre for Marine Research, Hydrobiological Station of Rodos, Rodos, 85100, Greece 3Stazione Zoologica Anton Dohrn - Benthos Ecology Center, Villa Dohrn - Punta San Pietro 1, I-80077 - Ischia Porto (Napoli), Italy 4Institute of Marine Biology, Biotechnology, and Aquaculture, Hellenic Centre for Marine Research, 71500 Heraklion Kriti, Greece 5Institute of Oceanography, Hellenic Centre for Marine Research, Anavyssos, 19013 Greece 6European Commission, Joint Research Centre – Directorate for Sustainable Resources, Water & Marine Resources Unit, Ispra, Italy *Corresponding author E-mail:
[email protected] Received: 1 March 2018 / Accepted: 6 August 2018 / Published online: 5 September 2018 Handling editor: Vadim E. Panov Abstract This work presents a current (2018) annotated list of marine NIS and cryptogenic species in Greek marine waters. For this purpose, we updated information from previous lists, included new data from several new NIS and cryptogenic records and recent taxonomic studies, and followed current taxonomic modifications for the alien/cryptogenic status of several introduced species. Our extensive literature survey and revisions resulted in the exclusion of 61 species, which were included in previous lists, and the addition of 41 new alien species reported in the 2016–2018 period plus ten old NIS records.