| Summary: | A total of seven species of parasitic ciliates was recovered from the studied fishes of D±bie Lake located in the estuary of the Odra River. The common bream harboured the following species: Chilodonella hexasticha, Ch. piscicola, Ichthyophthirius multifiliis, Trichodina modesta, and Trichodinella epizootica. The white bream turned out to be the host for: Ch. piscicola, Capriniana piscium, I. multifiliis, T. modesta, Tripartiella copiosa, and T. epizootica. Three of the above species constitute new records for the parasite fauna of the common bream in Poland, while five-new records for the white bream. Ciliates T. modesta are a new species for Polish parasite fauna. The white bream became a new host for C. piscium. The measurements and photographs of T. modesta and T. copiosa are provided in this paper.
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