| Number seen/Abundance | Date | Location | Comments | Recorded by |
|---|---|---|---|---|
| Present | 2006-03-01 | Intertidal below Hen Cliff, Kimmeridge |
Steve Trewhella | |
| 100 | 2009-07-06 | Mount Batten Rocky beach situated just out of Plymouth Sound. Exposed to harsh weather conditions and strong currents. |
On rocks | Liz Bone |