Thornback
noun
1.
a skate, Raja clavata, of European waters, having short spines on the back and tail.
2.
a California ray, Platyrhinoidis triseriatus, belonging to the guitarfish group.
noun
1.
a European ray, Raja clavata, having a row of spines along the back and tail
2.
a similar fish, Platyrhinoidis triseriata, of the Pacific Ocean
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