Atlantic Thorny Oyster
Spondylus americanus
A heavy, spiny shell in orange, red or white, cemented to reef ledges and rarely reaching the beach intact.
- Typical size
- 3–6 in
- How often it turns up
- Rare on beaches
- Collecting
- Check local rules
- Handling
- Sharp edges
Beach-washed valves are usually fine. Live take from reef is restricted in many Florida waters.
How to tell it apart
- Long spines radiating from the valve
- Bright orange, red or white colour
- Ball-and-socket hinge teeth
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