The distinctive blue blotches on the dorsal surface of the marbled ray.    
  Part of: Chatzispyrou A, Gubili C, Laiaki M, Mantopoulou-Palouka D, Kavadas S (2020) First record of the marbled ray, Dasyatis marmorata (Elasmobranchii: Dasyatidae), from Greece (central Aegean Sea). Biodiversity Data Journal 8: e51100. https://doi.org/10.3897/BDJ.8.e51100