| Number seen/Abundance | Date | Location | Comments | Recorded by |
|---|---|---|---|---|
| 100+ | 2010-06-14 | Mousehole Harbour Mousehole harbour in Mounts bay Blue jellyfish - Cyanea lamarckii |
Swimming in the gap of the harbour at High spring tide | Gus Caslake |
| 1 | 2010-06-14 | Salcombe-Kingsbridge Estuary North of Woodville Rocks, south of town centre on west side of estuary, South Hams, South Devon Coast |
Found pulsating above the seagrass meadow near the water surface | DeAmicis Stacey |
| 2 - one about 20cms diam and the other about 10cms, 500m apart | 2010-06-27 | River Tamar On the Cornish side of the River Tamar, between the Tamar Bridge ane the River Lyner. About 10m off shore. Just after high tide. Seen whilst out kayaking |
Seen drifting at the 10m off the Tamar Estury in about 3m of water near seaweed | Sue Carlyon |
| 15 | 2010-07-03 | Bovisand Bay Small sandy beach just East of Plymouth |
several individuals floating amongst seaweed, some small (3-4cm diameter) and some up to 12cm. Most of them were dead. | Annika Whitford |
| 1 | 2010-07-14 | Plymouth Harbour Queen Anne\'s Battery marina |
in marina - alive; 10cm diameter approx | Val Brown |
| 1 | 07/08/2011 | Skipi geo, Birsay, Orkney Rocky headland, |
Dead without tentacles, vivid blue | penny martin |