Upload Your Entry
![](https://kythera-family.net/en/media/view/1/1066301244.jpg)
![](https://kythera-family.net/en/media/view/1/1066301244.jpg)
Thorny Oyster interior
The smooth white interior of a Thorny Oyster, Spondylus gaederopus, showing the strong, brown hinge-teeth and a yellowish muscle scar. 7 cm long. Photograph ©James Prineas, 2003