| Clue | Source | Date |
|---|---|---|
| Sea urchin variety | Eugene Sheffer | 21 Mar 2024 |
| Flat sea urchin thought to resemble a coin | USA Today | 28 Oct 2021 |
| Disk-shaped sea urchin | USA Today | 20 Sep 2018 |
| Disk-shaped sea urchin | ||
| Flattened seaГ%82В urchin found on beaches (2 words) | Family Time | 30 Oct 2017 |
| Disk-shaped sea creature | Newsday | 23 Aug 2015 |
| Disk-shaped sea creature | ||
| Flat sea urchin | ||
| Potential beach find | ||
| Disk-shaped sea creature | ||
| Beach find | ||
| Beach find | ||
| Disklike sea creature | ||
| Earthy echinoderm? | ||
| Beach urchin | ||
| Flat sea urchin (with money back) | ||
| Sea urchin | ||
| Sea urchin. |