The present study evaluated the Monogenea fauna parasitizing Trachelyopterus galeatus Linnaeus, 1766 (Cangati) and investigated the influence of environmental and morphometric factors on the abundance of these parasites. Six species of monogeneans were identified, with Ameloblastella sp. and Cosmetocleithrum sp. being the most prevalent and having the highest mean intensity. Ameloblastella sp. stood out significantly compared to the other species, suggesting greater adaptive and competitive efficiency. It was observed that 46% of the fish harbored two species of Monogenea, while 10% harbored four or five species, indicating the coexistence of these parasites. Despite variations in host weight, length, and condition factor, these characteristics showed no significant relationship with the abundance of Monogenea, suggesting that individual body factors are not determinants of the infestati...