Thorny oyster
Spondylus gaederopus, thorny oyster, model, made by Guy Lawrence Wilkins, London, England
Thorny oyster
Spondylus varius Sowerby, 1826, thorny oyster, shell, location unknown
Thorny oyster
Spondylus sp., thorny oyster, shell, from California, USA
Thorny oyster
Spondylus sp., thorny oyster, shell, from California