The extraordinarily rich and productive Southern Ocean has been commercially exploited for more than 200 years. As the region is increasingly affected by climate change, understanding the impact of these changes on marine ecosystems is vital if we are ensure that these waters are exploited sustainably. Drawing together fisheries scientists, oceanographers and acoustic engineers from 14 nations, this study will provide a detailed and integrated view of large marine ecosystems – the environment, food supply and main predators. It will deepen our understanding of the impact of human activity on Antarctic ecosystems, and help develop precise and effective management strategies.