ABSTRACT Rhizophora apiculata leaves contain flavonoids, tannins, saponins, and quinones which have antioxidant, antibacterial and anti-inflammatory power. This research was conducted from August to November 2019 at the Fisheries and Marine Faculty, Riau University. The purpose of this study was to analyze the histopathology of liver and intestine of P. hypophthalmus that was fed with R. …