Thornback Ray Distribution

Thornback Ray © Marc Dando.The eggcase of the Thornback Ray is common around the UK and Ireland. With an approximate capsule length of 65mm, a square, 'boxy' appearance and obvious keels, the Thornback can be one of the easier eggcases to identify.

While their eggcase might be easy to ID, the adult Thornback Ray can be anything but, demonstrating an astonishing range of morphological variation, depending on habitat. For example, on Wales' Llyn Peninsula, Thornbacks caught on the south side are extremely thorny (nicknamed 'crocodiles' by anglers), while their counterparts on the north side are relatively thorn-free!

Read the Shark Trust's Thornback Ray ID Guide to discover more about the biology and conservation of the Thornback Ray, as well as information about fisheries.


Distribution of Thornback Ray eggcases:

Red Pin.Species verified (photo or specimen seen by the Shark Trust)
Blue Pin.Species not verified
Yellow Pin.Underwater eggcase