The “European Eel Investigation and Assessment of their Decline” project (or EELIAD), funded under the seventh framework programme (FP7) which is a grant funding programme, provides scientific knowledge to allow the recovery of European eel populations. The initiative is characterised by scientific collaboration and the deployment of networking activities to establish a network of excellence throughout Europe. It aims to increase the understanding of the behaviour, biology and ecology of eels, particularly by bringing together numerous external (i.e. environmental) and internal (i.e. biological) factors that may influence their migration. To reach this goal, large-scale monitoring and sensing technologies, such as automatized and remote sensing devices supported by numerical models, are being used.