On Thursday, 14 October 2025, the CytoMERtrie 2 seminar was held at IUEM (Plouzané), organised by the CYTOMER platforms of LEMAR (Christophe Lambert & Nelly Le Goïc) and HYPERION of LBAI (Nadège Marec & Pierre Pochard), following the resounding success of the first seminar held in 2022. Thanks to seven presentations by speakers from Finistère and Marseille, the diversity and evolution of flow cytometry analysis techniques in the marine environment were outlined. Particular focus was placed on new techniques and applications of flow cytometry in our fields.

More than 100 people attended the seminar, about half of them remotely, which made it possible to broadcast it throughout France.

This half-day seminar provided an opportunity to appreciate the evolving potential of flow cytometry for the study of marine models and ecosystems, to expand into other fields, and to gain a better understanding of the strengths present in Finistère in terms of available technologies and specific expertise.

There is no doubt that this 2^nd CytoMERtrie seminar will lead to future collaborations and projects aimed at understanding how marine ecosystems function in a changing and constrained environment, as we await the next meeting.