Total mercury (THg) and methylmercury (MeHg) concentrations were investigated in two different species from the Izmir Bay. The levels of THg and MeHg in fish tissue, ranging from 4.4 to 221.4 µg THg kg and 3.8-194.8 µg MeHg kg (wet wt.), varied according to sampling point and season. The results indicate that none of the fish analysed was ≥ 0.500 µg g for THg and ≥ 0.300 µg g for MeHg and nor did they exceed the WHO limit [1].