Under the Environment (Wales) Act (2016), Section 7 requires biodiversity lists to be produced. These lists include types of species which are of 'Principle Importance' for the purpose of maintain and enhancing biodiversity in relation to Wales. This list supersedes the duty in Section 42 of the NERC Act 2006. In addition to this marine species can be protected under the OSPAR Convention. The OSPAR convention has established a list of 'threatened and/or declining species and habitats' in the
North-East Atlantic. This spatial dataset details the location of those marine species classed of 'Principle Importance' under Section 7 and are regarded as 'threatened or declining' under OSPAR in
Wales. These species include: Alkmaria Romijni tentacled lagoon worm, Anotrichium barbatum bearded red seaweed, Cruoria Cruoriiformis, Edwardsia Timida burrowing anemone, Eunicella Verrucosa pink sea fan, Grateloupia Dermocorynus montagnei, Haliclystus auricula stalked jellyfish, Hippocampus sp., Lithothamnion coralloides Coral maerl, Lucernariopsis Campanulata stalked jellyfish, Arctica Islandica Ocean Quahog, Ostrea Edulis, Padina Pavonica, Palinurus Elephas Crawfish, Phymatolithon calcareum common maerl and Tenellia Adspersa.