SEANOE (SEA scieNtific Open data Edition) is a publisher of scientific data in the field of marine sciences. It is operated by Sismer within the framework of the Odatis. Data published by SEANOE are available free. They can be used in accordance with the terms of the Creative Commons license selected by the author of the data. Seance contributes to the Open Access / Open Science movement for free access for everyone to all scientific data financed by public funds for the benefit of research.