Several epibenthos/fish samples (diversity, density, biomass) will be taken with an 8m beam trawl for the continuous sampling program in the wind energy exploitation zones and in relation to MSFD obligations. More specifically the impact of hard substrates (windmills) and the absence of fisheries on the soft substratum fish and epifauna is investigated. Secondly the impact of fishing at the boarder of the concession zones (fringe effects) on these ecosystem components are investigated.