In 2021 The European Marine Biological Resource Centre European Research Infrastructure Consortium (EMBRC-ERIC, hereinafter referred as EMBRC) launched the European Marine Omics Biodiversity Observation Network (EMO BON) which aims to be the first long-term marine genomic observatory on a European scale. EMO BON is a biological observatory network built on robust methodologies that produces quality-controlled genomic data following high standards. EMO BON focuses on producing and providing access to long-term baseline genomic biodiversity data and supporting the monitoring of Essential Ocean and Biodiversity Variables (EOVs and EBVs) and ecosystem research. The project data, metadata, and their life cycle are described in this current document: the Data Management Plan (DMP). The DMP is a living document that will be updated continuously during the pilot period when the project is re-evaluated by the EMBRC General Assembly (GA) and the EMO BON Operational Commitee.