EMODnet is the most comprehensive in situ marine data service in Europe, offering a wealth of in water Ocean observations, data and data products, spanning the coast to the open Ocean and the surface to the deep sea. It provides easy and free access to marine data, metadata and data products and services, spanning seven broad disciplinary themes: bathymetry, geology, physics, chemistry, biology, seabed habitats and human activities. The recent thematic unification is a major upgrade, which simplifies access and enhances the EMODnet user experience.