Echi, P.C. and Nnamdi, O.J. 2025. The Prevalence of occurrence of an opportunistic pathogen in Gynmnarchus niloticus, Cuvier (1829) In Anambra River, Nigeria. Sahel Journal of Life Sciences FUDMA. 3, 1 (Mar. 2025), 79–86. DOI:https://doi.org/10.33003/sajols-2025-0301-10.