The U@MARENOSTRUM project facilitates online dialogue between citizens and representatives of the Ionian Islands Region of Greece and the Valencia Region of Spain on issues regarding water protection and management in the Mediterranean. The presentation discusses activity and participation on the Ionian Islands platform from January 2010 to January 2011, including over 3,000 visits from 29 countries, 1,673 registered users who created forum topics and posted arguments, and citizens' letters to officials on issues like pollution and endangered species. The Ionian Islands Region supports citizens' contribution on the platform as important for water policy.