Across Wales Drop-down Video monitoring 2004-2005 dataset https://portal.medin.org.uk/portal/start.php?tpc=007_NRW_DS87090 Drop-down video surveys of Special Area of Conservation (SACs) across Wales (Pen Llyn a'r Sarnau, Menai Strait and Conwy Bay, Cardigan Bay and Pembrokeshire). Work carried out by Seastar Survey under contract to Countryside Council of Wales (CCW). The data was collected to enable site monitoring to support management and reporting of SACs in Wales. The monitoring of subtidal aspects of SACs will indicate whether the desired condition of the feature of interest for which the site was designated is being achieved. The work will also enable judgements to be made about whether the management of the site is appropriate. Analysis of video recordings from the 2005 survey will be used to produce descriptions of the seabed environment including substrata and faunal communities as well as classifying the different sites into biotopes according to Connor et al. (2004). Survey areas within the SACs focused on north Pen Llyn, Bardsey Island, Tremadog Bay and Moelfre in north Wales, areas off Cardigan Island, Cemaes Head and between Aberaeron and Llangranog (off Newquay) within Cardigan Bay, and Hats and Barrels Reef, Bishops and Clerks, Skokholm Island and the Castlemartin ridges in Pembrokeshire. 20060531