Contamination status and spatial distribution of organochlorine compounds in fishes from Nansei Islands, Japan

► Contamination patterns of OCs in fishes varied between locations. ► Elevated levels of CHLs, DDTs and PCBs were detected in both the fish species. ► No sex differences of OCs were observed in both tilapia and mullet species. ► Different accumulation profiles of CHLs and PCBs were observed between species.