The list below includes information for the most widespread alien species recorded in the Hellenic Seas (Eastern Mediterranean). Each species includes: short description, biological-ecological traits, pathway of introduction, common name, impact on the marine ecosystem, whether the species is edible or dangerous as well their spatial distribution in the Hellenic Seas. The categories of pathways of introduction of introductions are the following: TS = Transport-Stowaway (vessels), UNA = Unaided, REL = Releases, UNK = Unknown, TC = Transport-Contaminant, EC = Escape from Confinemed.

A detailed list with all the alien species can be found here.