Comparisons of metal concentrations (Fe, Zn, Cu, Cr, Pb and Cd) were made in sediment and water with those in tissues of glass eel (Anguilla anguilla Linnaeus, 1758) collected in five stations from Loukkos estuary (Morocco, eastern Atlantic). Concentrations of selected metals were measured using an atomic absorption spectrophotometer (AAS). Significant correlations (p < 0.05) between Cu-Pb were observed in sediment, Fe-Pb, Cr-Pb and Cr-Fe in water and Zn-Fe in fish. The metal levels found in tissues in the glass eel were below the legal limits for human consumption, but can induce sever dysfunctioning for the eel.