Bioaccumulation of mercury in the trophic chain of flatfish from the Baltic Sea

► Hg content of flatfish depends on the species, tissue, sex, length, food and region. ► Muscle tissue of Baltic turbot (Scophthalmus maximus) had a high affinity for Hg. ► Baltic turbot, most accurately reflects the level of Hg in environment. ► Baltic turbot an important a suitable and cost-effective bioindicator of Hg. ► BF and BMF indicated that flatfish accumulate Hg from water, sediments, and food.