The Bay of Gulluk in Southeastern Aegean Sea (Turkey) is very important by the potential of marine product in the Aegean Sea. There are various polluting elements in Gulluk Bay. The current situation of the bay and impact of pollutants have became necessity. Dicentrarchus labrax are frequently used for human consumption. In this study, heavy metals (Pb, Cd) and trace elements (Cu, Zn) were analyzed in fish (D. labrax) and sediments in the Bay of Gulluk by atomic absorption spectrometry. The average metal concentrations in the fish varied in the following ranges: Pb; < 0.02-0.4, Cd; < 0.01-0.04, Cu; < 0.1, Zn; < 0.5-7.2 mg kg(-1). In addition, seven sediment samples were analyzed and avarage concentrations of them were found as Zn; 80.8 +/- 0.45, Cu; 25.2 +/- 0.14, Pb; 20.0 +/- 2, Cd; 0.560.08 mg kg(-1). The accuracy and precision of our results were checked by using International Certified Reference samples (fish: DORM-2, sediment: HISS-1). (c) 2005 Elsevier Ltd. All rights reserved.