There is scarce information regarding the population structure of this species. According to the genetic studies available, there is a low level of genetic differentiation between Thornback ray populations, across the Atlantic area, including the Irish and Celtic Seas. Nevertheless, more information is needed (Chevolot et al. 2006)(Chevolot et al. 2006).

Another profile is available for thornback ray in the North Sea, Skagerrak, Kattegat, and the eastern English Channel.