Seasonal changes in the epiphyte flora of an invasive species, Codium fragile subsp. fragile (Suringar) Hariot 1889, along the coast of the Çanakkale Strait (Dardanelles) are reported. Samples were collected between December 2011 and November 2012 from depths of 0-1 m. The whole thallus was examined for epiphytes and 48 taxa epiphytes were identified (27 taxa Rhodophyta, 7 taxa Ochrophyta and 14 taxa Chlorophyta). The most common epiphytes were Ceramiales (Rhodophyta), Ectocarpales (Ochrophyta) and Ulvales (Chlorophyta) in this order.