| Number seen/Abundance | Date | Location | Comments | Species |
|---|---|---|---|---|
| Large numb | 2003-07-09 | Outer Bristol Channel |
Flat calm water, Velella covering several square kilometres of water. | Velella velella |
| 1 | 2001-07-31 | Turbot Bank off Freshwater, Pembrokeshire |
Sighting made as part of scientific beam trawl by the School of Ocean Sciences, University of Wales, Bangor. Depth around 19m. Single specimen on common whelk shell with a hermit crab. | Calliactis parasitica |