Thornback Ray

What you're looking at

The thornback ray (Raja clavata) is by far the most-encountered UK ray — a diamond-shaped fish marked with a blotched brown-and-cream camouflage and named for the row of stout, curved bony "thorns" running down the centre of its back and tail.

Key features

• Shape: Broad diamond, with the wing tips slightly rounded rather than pointed.
• Skin: Coarse and abrasive — every adult is covered in small spines on both sides of the body, and males develop additional belly-thorns at maturity.
• Dorsal thorns: A row of large, curved thorns runs down the midline of the back and onto the tail — broad-based and pearl-like. This is the most reliable single ID feature.
• Markings: Mottled tan, brown, and cream with darker blotches and small "eye spots" scattered across the wings — the pattern varies hugely between individuals. Underside white.
• Tail: Whip-like with two small dorsal fins near the tip. No stinging spine (thornbacks are not stingrays).
• Size: Most fish 2–6 kg; specimen at 8 kg+; UK record over 14 kg.

Confusion species

• Blonde ray: Paler, less mottled, abundant small dark spots that go right out to the wing margins. No prominent dorsal thorn row in juveniles.
• Spotted ray: Smaller and slimmer, with dark spots that stop short of the wing margins (a clean pale border).
• Small-eyed ray: Very small eyes for a ray, pale lines running parallel to the wing edges.
• Common stingray: Smooth skin, no thorn row, and — crucially — has a venomous serrated spine on the tail. Handle with care.

Where to find them

Mixed and clean ground in 10–60 m of water. Thornbacks come inshore in spring and summer to spawn, providing classic boat and shore fishing in estuaries like the Thames, Solway and Severn. Hard-shelled and oily baits work well — peeler crab, whole squid, mackerel fillet. Always lift rays by the shoulders, never by the tail, and unhook over a wet mat to protect the slime layer.