This data set comprises of marine epibenthos (74 identified taxa derived from Algae, Annelida, Arthropoda, Bryozoa, Chordata, Cnidaria, Echinodermata, Mollusca, Nemertea, Porifera) data quantified in June 2009 at The Wave Hub development zone, a Marine Renewable Energy Installation (MREI) in Hayle, Cornwall, South West UK. The Wave Hub development zone is compartmentalised into four areas, five sites were surveyed in each area using a high definition towed underwater video system. At each site a 200 x 0.5 metre transect of the seabed was undertaken. The survey was carried out as a baseline to characterise the seabed fauna present, prior to any subsea infrastructure being deployed at the test site. The design was also replicated to the east and west of the Wave Hub site to provide controls for future impact assessment.