mussel (analysis in cooperation with the International University of Bremen IUB). In a testing area near Nordergründe, 17 nautical miles off the coast from the city of Bremerhaven, three test moorings with [...] clean water with good O 2 -conditions. Furthermore, the concentration of pollutants, pesticides and near-surface agents can be considered as minimal. One can assume that organisms living under good water [...] Therefore, mussels grown under offshore conditions should have a better health status as mussels grown in near- and inshore areas. Additionally, the good health status of offshore cultured mussels should result