This week, we had a chance to participate to the TREC symposium at EMBL in Heidelberg. Impressive expedition led by EMBL from plankton diversity to chemical profiling and bioacoustics on the European coast.  Gaelle and Johan presented the project AtlaSymbio funded by the Moore Foundation, which aims to explore at the subcellular scale different photosymbioses we collected during the TREC expedition. Thanks to the organizers of the symposium.