Photo of the Marine Monitoring Platform The Cretan Sea is a subpart of the ultra-oligotrophic eastern Mediterranean Sea. Among the major research challenges in this area, extreme events and their effects on primary productivity is a topic of concern. The JERICO-S3 Cretan Sea Pilot Super Site (PSS), a component of the POSEIDON Operational System, aims to demonstrate the contribution of a PSS approach to such studies via four out of its six actions: Action #2 Improved approximations of primary production; Action #3 Extreme events affecting phytoplankton – AQUACOSM collaboration; Action #5 New sampling strategies, new technologies, best practices; Action #6 Partnership building. For this purpose, JERICO-S3, via the Cretan Sea PSS…