||This dataset comprised marine surveys undertaken by the Natural Resources Wales (and previously Countryside Council for Wales) for Marine alien and non-native species, currently held in Marine Recorder. The surveys represent ongoing non-native monitoring, sightings and ad-hoc records of invasive and non-native species supplied to NRW or noted outside of other research and monitoring work.
||Alga , Annelid , Bony Fish (Actinopterygii) , Bryozoan , Cartilagenous Fish (Chondrichthyes) , Chromist , Coelenterate (=Cnidarian) , Crustacean , Echinoderm , Mollusc , Sponge (Porifera) , Tunicate (Urochordata) , Undetermined 
|Geographic Coverage/Site Name
|Geographic Coverage Notes
||All Wales, although the majority of data is collected for habitats know to be colonised by non-native species, such as ports and harbours.