| Number seen/Abundance | Date | Location | Comments | Recorded by |
|---|---|---|---|---|
| Beds approx 20m2 | 2009-09-08 | East Head Off the east side of the East Head spit, Chichester Harbour. |
Beds on intertidal mudflats | Iain Vincent |
| Common >50% | 2009-09-29 | West Mud West side of river Tamar, opposite dockyard, between Millbrook and St John\'s Lake |
Swam over 50m square without finding the edge of the bed | John Hepburn |
| Shoot density was approx 1000 / 0.25x0.25m quadrat | 2009-09-18 | Langstone Harbour Mudflats off the west coast of Hayling Island |
Moderate - high levels of epiphyte cover and extensive algal matting to the north of the bed. evidence of scaring and bed removal from moored boats. | Iain Vincent |
| Shoot density was approx 1000 / 0.25x0.25m quadrat | 2009-09-25 | Creak Rythe, Chichester Harbour Intertidal mudflats |
High epiphyte and algal cover | Iain Vincent |
| Shoot density was approx 1000 / 0.25x0.25m quadrat | 2009-09-21 | Ryde, Isle of Wight Ryde beach (sand) west of the pier |
Low - moderate epiphyte cover, no significant algal cover | Iain Vincent |