The Utilization of mangrove A. alba can be used as an alternative natural preservative for Mackerel. Mangrove A. alba contains potential bioactive compounds, such as antibacterial and antifungal that can be utilized as a natural preservative for Mackerel. The phytochemical test needs to determine the content of chemical compounds in mangrove A. alba leaf. Mackerel has a high source of protein a…