| Number seen/Abundance | Date | Location | Comments | Species |
|---|---|---|---|---|
| 50-100 | 10/08/2011 | Bangor A beach near Bangor pier |
Many washed up on the shore, a few seen pulsating along the Menai strait. Sizes range from 10cm diameter to 25cm. | Chrysaora hysoscella |
| 10-30 | 10/08/2011 | Bangor A beach near Bangor pier |
Many are washed up on shore, many more seen in the Menai Strait. sizes from 20cm diameter to 30cm. | Cyanea capillata |