Foreword. Preface. Invertebrates of Lower Trophic Levels. Persistent pollutants in marine invertebrates, D R Livingstone. Occurrence and fate of persistent pollutants in marine invertebrates - studies with polychaetes and the common mussel, Mytilus edulis, W Ernst. Invertebrates of Higher Trophic Levels. The distribution of 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin in juvenile blue crabs, Callinectes sapidus and the physiological effects of consumption of food from a polluted environment on this species, A Cristini & K Cooper. The relationship between PCBs in biota and in water and sediment from New Bedford harbor - a modelling evaluation, J P Connolly. Fish. Chlorinated and aromatic hydrocarbons in bottom sediments, fish and marine mammals in US coastal waters - laboratory and field studies of metabolism and accumulation, U Varanasi et al. Marine Mammals. The toxicokinetics of PCBs in marine mammals with special reference to possible interactions of individual congeners with the cytochrome P450-dependent monooxygenase system, J P Boon et al. Chemical modernization and vulnerability of cetaceans - increasing toxic threat of organochlorine contaminants, S Tanabe & R Tatsukawa. Fish-Eating Birds. Patterns and trends of organochlorine contamination in Canadian sea birds eggs, J Elliott et al. Problems of bioaccumulation in fish-eating birds from the Mediterranean, A Renzoni. The ecotoxicology of persistent pollutants in marine fish-eating birds, C H Walker. Overview. Pollutants in marine ecosystems - an overview, D R Livingstone et al.