Mangosteen peel (Garcinia mangostana) can be used to treat striped catfish infected with Aeromonas hydrophila. The extract of mangosteen peel contains antioxidant and antibacterial properties, such as tannins, alkaloids, flavonoids, and saponins, which can help fight infection. Study was conducted from December 2024 to March 2025 at the Laboratory of Fish Parasites and Diseases, University of R…