All data enthusiasts (data scientists and practitioners, students, researchers, representatives from both private and public sector, that work to improve the aquaculture, fisheries, marine and environmental management, or develop ICT solutions for environmental and socio economics) were invited to join the datathon co-organised by the RDA-Europe and BlueBRIDGE from June 15 to 16, 2017, in Heraklion, Crete, Greece.