Abtract Parasites are organisms that live on other organisms that can benefit from the symbiosis, while the host is harmed. This research was conducted from March to Mei 2022 at the Laboratory of Fish Parasites and Diseases, Department of Aquaculture, Faculty of Fisheries and Marine. Trichogaster trichopterus sampling was carried out at the Riau University Fisheries Reservoir. The aim of the s…