The project “Ocean-3, ecosystem monitoring in the Barents Sea” will establish the base for joint Norwegian-Russian monitoring of the Barents Sea ecosystem. The project was part of the Work Programme for the Norwegian-Russian environmental cooperation 2013-2015 (approved in Svanhovd, 18 Sept. 2012), and has been approved for another 3 years 2016-2018 by the Joint Russian Norwegian Environmental Commission in Moscow December 1st 2015.The main partners in this cooperation from the Norwegian side are the Norwegian Polar Institute (NPI), the Institute of Marine Research (IMR) and the Norwegian Environment Agency , and from the Russian side Sevmorgeo. The project's target groups are Norwegian and Russian management, research and monitoring institutions. The results of this project form the baseline for further development of a joint ecosystem-based monitoring programme for the Barents Sea.