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Abstract
This study was carried out to detect the parasites affecting some marine fishes. Fish species collected were 100 Scombromorus commerson, 100 Morone labrax and 100 Siganus revulatus from Suez Canal water at Suez and Ismailia provinces. There was no pathognomonic signs in infested fishes except marbling of gills in fishes with gill monogenean infestations. Other signs and P. M. lesions were bulging of operculi, haemorrhages, abrasions and ulcers on skin, sluggish movement, abdominal distension and emaciation, pale liver, congesion and enlargement of stomach and intestine with entritis in some cases. The highest infestation rate was in S. commerson (82%) followed by M. labrax (72%) and S. revulatus (56%). The isolated parasites in S. commerson were monogenetic trematodes (Neothoracocotyle commersoni and Pricea multae), in M. labrax were unidentified monogenea, Digenetic trematodes (Acanthostomum imbutiforms, Erilepturus hamati, Propycnadenoids secundus, Pseudocreadium sohali, Podocotyle parpupenai, Tangiopsis chinensis and Pacificreadium serrani) and crustacean copepods (Lernanthropus psciaenae and Caligus carangis) and in S. revulatus were monogenetic trematodes (Paranella diplodae and Pseudohaliotrematoids polymorphus eilaticus), nematodes (Procamallanus inopenatus) and acanthocephala (Diplosentis amphacanthi). Seasonal prevalence, relation between fish body weight and length and infestation, statistical analysis and histopathological picture were also recorded.