| Number seen/Abundance | Date | Location | Comments | Recorded by |
|---|---|---|---|---|
| C | 2004-02-20 | Batten Bay,Plymouth, rocky shore with boulders |
Common | Shereon Knowles |
| A | 2002-09-07 | Batten Bay, Mount Batten, Plymouth, Devon |
Abundant, seen during Seashore Safari in rockpools and on rocks | Liz Barton |
| A | 2002-03-28 | Batten Bay, nr Plymouth |
Abundant on the lower shore in shallow water,attached to boulders. Many young plants attached to boulders. | Caroline Farrell |
| P | 2004-05-06 | Batten Bay, Mountbatten nr Plymouth |
Seen on mid-low shore. | West Park Primary |
| P | 2005-03-12 | Firestone Bay Firestone Bay, Plymouth Sound |
Seen on rocks on lower shore | Seashore Safari |
| P | 2005-05-24 | Mothecombe Beach Mothecombe Beach near Erme Estuary, South Devon |
Seen by group 10,years 4-6, Alice, Keira, Rachel, Olivia and Holly Gask | Holbeton School |
| O | 2005-08-02 | Far pontoon, Queen Anne's Battery marina |
occasional on walls | Judith Oakley |
| Abundant | 2006-09-09 | Polzeath, Cornwall. Reef at N end of beach. |
Guy Baker | |
| 2007-07-14 | peveril point swanage dorset |
Steve Trewhella | ||
| Very Abundant | 2008-08-03 | St Georges Island/Looe Island. Looe. Cornwall. South West England. |
Covered all of the lower shore. 2-3m fronds. Sheltered shore. | Amelia Bridges |
| 2008-09-28 | Battery Rocks Battery Rocks, Below Jubalee pool, Penzance |
Frequent. Lower shore rock pools. | Larissa Paver | |
| Abundant | 2009-05-24 | Stackhouse Cove, Penzance In gulleys and under overhangs at Stackhouse Cove during a low of 0.9m |
Lower shore gulleys | Larissa Paver |
| Uncommon | 2009-08-02 | Hastings Directly east of the Stade. 2.3 metre low tide. Shore line pebbles and boulders with some rock pools in evidence |
Washed up and on the strandline | Nigel Sawyer |
| 1 | 2009-09-07 | Aberavon Beach Aberavon Beach, Wales |
Traethmelyn Primary School Doyle | |
| NA | 2009-08-13 | Blackpool Central - South Shore Sandy beach |
North West Wildlife Trusts Irish sea | |
| 05/02/2011 | Gyllyngvase Beach Rocky shore to the left and right hand sides of the beach. |
Kristie Wilkinson | ||
| 50 | 08/04/2011 | Mount Edgecumbe The rocky shore around the point of Mount Edgecumbe. |
Bex House | |
| 10 | 02/06/2011 | Batten Bay Rocky shore at Mount Batten |
Marlin Beach Rangers | |
| 20 | 01/06/2011 | Devil's Point Rocky shore at Devil's Point |
Marlin Beach Rangers | |
| 300+ | 21/11/2011 | Landguard Peninsula jutting out in to Harwich Harbour at the southern most tip of Suffolk |
washed up on to the beach, lying along 200m + of the strandline | Sarah Wynne |