This dataset contains shapefiles that show the potential and high confidence mapped extents of Annex I habitat 'Reef' in UK offshore waters. Annex I reefs occur where rocky areas or concretions made by marine animals arise from the surrounding seafloor.
These extents are also visualised on JNCC's website: http://jncc.defra.gov.uk/page-5201
Additional information source: http://jncc.defra.gov.uk/page-1448