Cartiligeous SpeciesSkate and Rays Ray, Cuckoo by David Proudfoot 27th May 2013 by David Proudfoot 27th May 2013 The cuckoo ray is one of the rarer of the European rays and has the typical ray shape with comparatively large rounded pectoral fins. There is a double line of spines down the tail and rear of the back. Read more 0 FacebookTwitterPinterestEmail