In total, 442 fish comprising four species, (Sprattus sprattus, Hyperoplus lanceolatus, Ammodytes tobianus, Pomatoschistus minutus) were investigated. The parasite fauna consisted of 22 species. The parasite community structure of the four hosts was compared. The diet of the hosts seemed to be the main factor determining the structure of the parasite community. Eight species of parasites occurred as larval stages. This indicated that fish were intermediate or paratenic hosts in their life cycle. The nematode Hysterothylacium sp. (Anisakidae) and the digeneanCryptocotyle lingua (Heterophyidea) were the dominant parasites. Sprat and sand eel play a very important role in parasite transmission to predacious fish and seabirds.