| Number seen/Abundance | Date | Location | Comments | Recorded by |
|---|---|---|---|---|
| P | 2000-07-08 | Hole in the wall, Falmouth, Cornwall. |
Extensive beds once through rocky grove near shore | Terry Middleton |
| P | 2004-07-30 | Hera Site of wreck of the HERA, Gull Rock E of Nare Head Cornwall, |
Patchy distribution on seabed around wreck,in troughs of gritty sand amongst dead shells | Sally Sharrock |
| 2007-12-07 | Metal ring on rocks 100m from 'Plage' slipway, St Anthony in Roseland towards opp headland. Sheltered shore, little wave action. Rocky down to shore, seaweed dominates. |
5m below high tide | John Nicholson |