Between March and July 2019, 11 fish belonging to the species Cichlasoma zarskei Ottoni, 2011 (Acará), Serrasalmus aff. rhombeus Linnaeus, 1766 (Piranha), Trachelyopterus galeatus Linnaeus, 1766 (Bagrinho) and Hoplias malabaricus Bloch, 1794 (Traíra) in the Pericumã river basin, Maranhão, Brazil were evaluated. Stomach, intestine and eye samples were taken for parasite analysis. Parasites belonging to the groups were identified: nematodes, genus Contracaecum sp.; Cystacanth of acantocephala; and larva of cestoda. In this research it was possible to report new associations in the host-parasite relationship, such as the first record of the genus Contracaecum sp. in the species C. zarskei, a parasite that presents zoonotic potential when infected raw or undercooked fish is consumed. The knowledge about the parasitofauna of the fish community in the Pericumã river basin, Maranhão, Braz...