This paper provides an overview of the H2020 Marine robotics research infrastructure network (EU Marine Robots) project. The overview is organized around the three main activities of infrastructure projects: i) Networking activities (NA); ii) Transnational access (TNA) in which access to marine robotic infrastructures from the partners is granted in competitive calls; iii) Joint research activities (JRA) aimed at making robotic infrastructures more operable and transitioning new systems and technologies to field operations. The strategic significance of the project and future developments are discussed as conclusions.