Toxic metals, macro and micro elements content in oysters and mussels were studied.
Highest As, Cd, Hg and Pb levels in oysters were measured in Istria sites.
Highest As, Cd, Hg and Pb levels in mussels were found in central Adriatic sites.
Significant differences in element levels between farming sites were determined.
Significant differences in elements levels between two species were found.