thornback

noun

1. Any animal with a thorny back, especially marine animals, such as:

2. The thornback guitarfish (Platyrhinoidis triseriata), a species of ray in the north-eastern Pacific Ocean.

3. The thornback ray or thornback skate (Raja clavata), a species of ray in the Atlantic Ocean.

4. The thornback skate (Dentiraja lemprieri), a fish endemic to Australia.