- any of several European rays with many tubercles on the back and a double row of spines on the tail
- a large European spider crab (Maja squinado) with a spiny back
- a guitarfish (Platyrhinoidis triseriata) with spines on the back, found in the Pacific
See thornback in American Heritage Dictionary 4
- A European ray (Raja clavata) having spines along the back.
- A fish (Platyrhinoidis triseriata) of Pacific waters, related to the guitarfish.
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