Background: A total of 297 individuals of the African sharptooth catfish, Clarias gariepinus were trapped between spring in 2017 and winter in 2018 from three aquatic habitats in the Nile Delta.\nResults: The Infestation level of parasites were highest in the fish farm (898 worms) followed by the River Nile (809 worms) and Mansouria Canal (728 worms). The cestode Polyonchobothrium clarias was the most intense (685 worms), followed by the digeneans Allocreadium sudanensis (637 worms) and then Orientocreadium batrochoides (378 worms). The nematodes Paracamallanus cyathopharynx and Procamallanus laeviconchus were moderately intense (353 and 205 worms, respectively). The digenean Astiotrema sp. attained lower intensity (168 worms), however only nine cestode worms belonging to Monobothriodes sp. were collected from the intestine of the catfish from the three habitats. Morphometric data were also given for water samples analysis and variations of infestation were discussed.\nConclusion: The high infestation level in the fish farm is may due to the high pollution level and low water flow. Phosphorus, pH value and biological oxygen demand and Iron showed high positive significant correlations with the prevalence values of various endoparasites infesting catfish, C. gariepinus. On the other hand, water temperature, Lead and Cadmium exhibited high negative significant correlations with the prevalence values.

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