After the successful first webinar in June 2020, introducing the five Blue-Cloud real-life demonstrators, we have launched a series of individual virtual meetings to discover each demonstrator. Experts from the partners involved will provide the most relevant details about the technical and conceptual issues that are being tackled thanks to the Blue-Cloud framework. The fourth webinar is scheduled on 12 February 2021 at 10:00 CET introducing "Zoo and Phytoplankton EOV Products", the demonstrator developed by the Flanders Marine Institute (VLIZ), in collaboration with the Faculty of Science and Engineering at Sorbonne University.