Taxonomy
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Chondrichthyes
- Order
- Rajiformes
- Family
- Rajidae
- Genus
- Raja
- Species
- clavata
Habitat
Thornback rays inhabit continental shelves in the Northeast Atlantic, from shallow coastal waters to depths of about 200 meters, preferring sandy, muddy, or gravelly seabeds. They are commonly found in temperate regions around the UK, France, and Norway, often staying close to the shore but venturing into deeper waters during warmer months.
Diet
Thornback rays primarily feed on bottom-dwelling invertebrates such as worms, crabs, shrimp, and mollusks, which they locate by foraging along the seafloor. They are nocturnal hunters, using their electroreceptors to detect buried prey and crushing it with their plate-like teeth. Feeding activity peaks at night in sandy or muddy habitats.
Behavior
Thornback rays are mostly solitary and benthic, spending much of the day partially buried in sediment to avoid predators and ambush prey. They are nocturnal, becoming more active at night for feeding, and exhibit minimal territorial behavior except during mating. These rays are not aggressive towards humans but may defend themselves with their spines if threatened.
Fishing
Thornback rays are a popular sport fish in the Northeast Atlantic, providing anglers with exciting battles that fund conservation through license fees and habitat protection programs. Use bottom fishing techniques with a strong rod and reel setup to handle their powerful runs and abrasive skin, focusing on anchoring baits on the seafloor. Recommended tackle includes a 8-12 foot heavy-action rod paired with a reel spooled with 20-30 lb test line, using a 4/0-6/0 hook rigged with fresh baits like worms, crabs, or shrimp to imitate their diet of bottom-dwelling invertebrates. The best seasons are spring and summer when they move closer to shore, with optimal fishing times at night due to their nocturnal feeding habits; target sandy, muddy, or gravelly seabeds in depths up to 200 meters around the UK, France, Norway, and other temperate regions. The IGFA all-tackle world record is approximately 16 pounds 12 ounces, showcasing the species' impressive size potential. As a Near Threatened species per IUCN, conservation efforts supported by anglers—such as catch-and-release practices and regulated slot limits in certain areas—serve as effective management tools to sustain populations and protect these vital marine ecosystems.
Conservation Status
Listed as Near Threatened by IUCN.