2013 - 2015 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Scores representing Magallana gigas (Pacific oyster) environmental suitability and introduction / spread risk for UK waters based on data from 2013 to 2015.

Data are scores calculated in 2020 to indicate the environmental suitability and risk of introduction into, and secondary spread of *Magallana gigas** in UK waters. Scores are calculated for each **cell of a grid based on ICES statistical rectangles split into *sixteenths for the geospatial extent of UK waters.