ABSTRACT Mengkapan City is one of the largest mangrove areas in Indonesia. One of the mangrove plants that have the potential as a drug and has been used traditionally is Xylocarpus granatum. This research has been carried out in March 2021. Samples are taken in the area of Mengkapan City. Phytochemicaltest and antibacterial are carried out at the Marine Microbiology Laboratory of the Facu…