"D." cf. "intermedius" has dark olive-green eyes and the blotch on each wing consists of a group of pale spots. "D." cf. "flossada" has pale yellow eyes, and the blotch on each wing is relatively large, roughly round, dark and with a pale ring around it. Additional differences between the two are found in the thorns on their tails and other morphometric features. Both are found around the British Isles, and their ranges broadly overlap in the seas around this archipelago, but "D." cf. "intermedius" is the most frequent species in the northern half (off Scotland and Northern Ireland), and "D." cf. "flossada" is the most frequent in the southwest (Celtic Sea) and at Rockall. The primary—possibly only—species in Ireland is "D." cf. "flossada" based mainly on the ICES International Bottom Trawl Survey and zoological specimens, the species off Norway is "D." cf. "intermedius" (no confirmed records of "D." cf. "flossada", but it might occur), and based on limited data the main in the North Sea, Skagerrak and Kattegat is "D." cf. "intermedius" (although at least one record of "D." cf. "flossada" in this region, off west Sweden, has been reported). Uncertainty exists about the exact species involved in the southern half of the range, but a preliminary morphological study indicates that the one in the Azores is "D." cf. "intermedius".