Apelafico collects data on density and diversity of pelagic fish in and around offshore wind farms in association with acoustic conditions during the construction and operation of wind farms. The project also zooms in on fish behaviour in the direct vicinity of pile driving activities (i.e. danger zone) and, tests and improves an acoustic deterrent device to mitigate detrimental impacts. The results will inform pathways to innovative, sustainable and economically viable Blue Growth. MARECO feeds into the project with its expertise on the physics of underwater sound and with its data on underwater sound produced by offshore wind farms.