Anzali wetland is located in the southwest of the Caspian Sea. A total of 86 European catfish, Silurus glanis L., 1758, were collected from April through July 2012 in this wetland . After recording biometric characteristics, common necropsy and parasitology methods were used. In the present study, a total of 17,214 individuals of 14 parasite species were recovered from the European catfish. Parasitofauna consisted of two protozoans: Ichthyophthirius multifiliis and Trichodina sp.; two nematodes: Raphidascaris acus and Eustrongylides excisus larvae; one acanthocephalan: Acanthocephalus lucii; three cestodes: Silurotaenia siluri , Proteocephalus osculatus and Bothriocephalus sp. larvae; two digenean trematodes: Orientocreadium siluri and Diplostomum spathaceum; two monogenean trematodes: Silurodiscoides vistulensis and Silurodiscoides siluri; and two crustaceans: copepodid stage of Lernaea cyprinacea and Argulus foliaceus. The occurrence of R. acus, I. multifiliis, Trichodina sp., Silurotaenia siluri, A. lucii , A. foliaceus in S. glanis are reported for the first time in Iran.
