Abstract

A total of 50 specimens of marine fish Siganus rivulatus were investigated for internal protozoa. The fish samples were collected from two positions: EL-Sigalaa and Dungunab Bay. The samples were taken from blood (from tail area) and also from the liver, kidney, and gonad. The study revealed Haemogregarina sp. from blood, Myxobolus sp. and Henneguya sp. recovered from Liver, kidney, and gonad. Also, the study revealed Cryptobia sp. from the Liver of Siganus rivulatus. The parasite prevalence in EL-Sigalaa is 56% while that for Dungunab Bay is 38%. Also, the density of the parasite is higher in EL-Sigalaa than that in Dungunab Bay. The Gonads had higher density (78%) in both locations and most of the parasite identified is Myxobolus sp..

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