In Singapore's coastal food web, the interplay of bioaccumulation, trophic transfer, and source tracing is crucial. Bioaccumulation entails the gradual buildup of harmful pollutants, such as per-and polyfluoroalkyl substances (PFAS), within organisms like fish and shellfish, posing risks to both marine life and human consumers. Source tracing becomes imperative to pinpoint the origins of pollutants, whether from industrial discharges, agricultural runoff, or urban activities. This understanding enables targeted mitigation strategies, essential for preserving the health of the coastal ecosystem.