Within the FixO3 project Service Activities (SA) give access to fully-process multidisciplinary data services and products. This includes the entire oceanic environment, from seafloor to the air-sea interface. The SA’s comprise high quality data services and products from 13 fixed-point multidisciplinary open ocean observatories included in the FixO3 network. These sustained open ocean observatories cover a broad geographical range from the Polar Regions to the Atlantic and Mediterranean. They demonstrate direct applications, such as maps of ecosystem indicators over European seas, or model validations with respect to in-situ data. In addition, FixO3 provides highly derived information products such as regional trends in ecosystem function and diversity.