This data is supplement research paper with title: Base Metabolomics of Snakehead and Mackerel Fish Using LC-HRMS for Tropical Geographic Authentication and Quality Assessment. The study aimed to identify unique chemical signatures and biomarkers indicative of the geographic origin and rearing conditions of these fish. Samples were collected from two geographically distinct regions: Palembang (GP) and Jambi (GJ) in South Sumatra, Indonesia