The European Marine Observation and Data Network (EMODnet) is a long term marine data initiative from the European Commission (EC) Directorate-General for Maritime Affairs and Fisheries (DG MARE), underpinning its Marine Knowledge 2020 strategy.

EMODnet is a consortium of organisations assembling European marine data, data products and metadata from diverse sources in a uniform way. The main purpose of EMODnet is to unlock fragmented and hidden marine data resources, to make these available to individuals and organisations (public and private), and to facilitate investment in sustainable coastal and offshore activities, through improved access to quality-assured, standardised and harmonised marine data, which are interoperable and free of restrictions on use.

The EMODnet data infrastructure is developed through a stepwise approach in 3 major phases. Currently EMODnet is in the 2nd phase of development, with seven sub-portals in operation that provide access to marine data from the following themes: bathymetry, geology, physics, chemistry, biology, seabed habitats and human activities. EMODnet development is a dynamic process, so that new data, products and functionality are added regularly, while portals are continuously improved to make the service more fit for purpose and user friendly, with the help of users and stakeholders.