Five ectoparastic ciliate species belongng to the genera Trihodina, Tripastiella and Partinchodenia were found on the gills of Clarias lazera and Oreochromis niloticus from the River Nile branches at Tanta city, Egypt. These ciliates include Trichodina maritinkae Basson and Van As, 1991, T. magna Van As and Basson, 1989 and T. centrostrigeata Basson ef.a/.,1983, one species of the genus Tripariiella ( first record in Africa ), namely 71 cichlidarum Basson etaLt 1983 and one species of the genus Paratrichodina namely P. africana Kazubski and EI-Tantawy.1986. Full descriptions and systematic positions of collected species are given and discussed .