Spondylus gaederopus reaches 15 cm. Characteristic bivalve cemented to rocks (not attached by a byssus), lower valve sculpted with long irregular spines, upper valve flatter. External color variable (white, pink, orange, violet), often masked by encrustations. Characteristic vivid-violet interior. Edible, sometimes harvested by divers. Lives on Mediterranean rocky walls and coralligenous habitats from 2 to 50 m.
Photo of European thorny oyster
Frequently asked questions
How big is the European thorny oyster?
European thorny oyster (Spondylus gaederopus) reaches 7–15 cm in length.
At what depth can you find the European thorny oyster?
European thorny oyster is found between 2–50 m deep.
Is the European thorny oyster dangerous to divers?
Danger level: Harmless.
What is the conservation status of the European thorny oyster?
IUCN status: Least concern (LC).
Where can you find the European thorny oyster?
Found in: East Atlantic, Macaronesia, Mediterranean.