Parties to the Agreement on the Conservation of Small Cetaceans of the Baltic, North East Atlantic, Irish, and North Seas (ASCOBANS) agreed on a series of important conservation measures at a meeting held from 10-12 September in Denmark. The agreement covers small migratory marine mammals, such as dolphins and porpoises, which are found in these northern and western European waters. Key outcomes of the 10th Meeting of the Parties to ASCOBANS (MOP10) are aimed at critical threats to these marine mammals.