| Number seen/Abundance | Date | Location | Comments | Species |
|---|---|---|---|---|
| 200 + | 2003-07-11 | Gower Peninsular,Southern end of beach at Rhossili Bay. |
Seen apparently stranded along a 0.5 mile approx stretch of beach.Possibly much the same further along the shore,as they could be seen in all directions, but did not walk any further. | Velella velella |