A total number of 1042 flathead mullet Mugil cephalus were searched for parasites during summer & autumn 2015 and winter & spring 2016. Six different parasite taxa belonging to Microsporidia, Myxozoa, Ciliophora, Anisakidae and Gnathostomatidae were identified. The total number of infested mullets along the study period with one or more parasites was 396 representing a percentage of 38.0%. Mullets were infested with Microsporum velveticum through ingesting the intermediate host. This parasite was observed in the intestinal epithelia, adipose tissue, liver, stomach epithelia, muscles and air bladder. Myxidium depressum was observed in the liver and gall bladder of infested mullets in a plasmid stage that had undergone sporogony forming multicellular myxospores. Trichodina murmanica was observed on the gill surface, the operculum and respiratory epithelium where superficial to deep ulcerative lesions were visible. Third Larval stages of Anisakis simplex, Raphidascaris acus and Gnathostoma spinigerum were observed free in the duodenum and ileim or encapsulated in the stomach epithelia, liver, and muscles. The infra-community of protists was highest in winter and fall while for parasitic nematodes was during spring and summer. Seasonal fluctuation of the parasite community was demonstrated by using standard calculations.