author(s)
Ali T Bdair and Abd Almotalib J Al-Rudainy

abstract
A total of 304 of freshwater fishes belongs to 12 fish species (Acanthobram amarmid, Alburnus caeruleus, Arabibarbus grypus, Carasobarbus luteus, Carassius auratus, Chondrostoma regium, Cyprinion macrostomum, Cyprinus carpio, Leuciscus vorax, Luciobarbus xanthopterus, Mystus pelusius and Planiliza abu) were collected from Tigris River at Al-Zaafaraniya Region, south of Baghdad City during the period from December 2016 to May 2017. Three hundred and three (303) fish were infecting by seven ectoparasite species including four trematodes and three crustacean infecting gills, skin and eyes. The study revealed the existence of six new fish hosts were reported for three species of these parasites, including two Trematode namely Clinostomum complanatum in Alburnus caeruleus, Arabibarbus grypus, Chondrostoma regium and Luciobarbus xanthopterus; and Diplostomum phoxini in Carassius auratus, in addition to Crustacean parasite (Ergasilus peregrinus) that infected Chondrostoma regium. The percentage incidence of infection, intensity of infection of parasite and site of infection were varied depending on species of parasite and host.