摘要:The green alga Codium fragile subsp. tomentosoides is one of the most common alien macroalgae in the Mediterranean, with a wide distribution in both the western and eastern basin. Populations of this taxon are present in Greece at least since the last decade of the 20th century, and today it can be found in several locations of the central and north Aegean Sea. Its spread seems to be still in progress along Greek coasts, presenting some sporadic blooms. However, no invasive behavior was observed at any studied site until today.