Species: Vanlig sandskjell (Mya arenaria)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2019 | 1 | 1 | 1 | 1 |
| 2018 | 1 | 2 | 2 | 2 |
| 2014 | 1 | 6 | 6 | 7 |
| 2013 | 1 | 3 | 3 | 4 |
| 2010 | 1 | 1 | 1 | 1 |
| 2007 | 1 | 1 | 1 | 1 |
| 2004 | 1 | 1 | 1 | 1 |
| 2001 | 1 | 1 | 1 | 1 |
| 1996 | 1 | 2 | 2 | 4 |
| 1994 | 1 | 3 | 3 | 4 |
| 1993 | 1 | 1 | 1 | 2 |
| Totalt alle år | 1 | 20 | 20 | 28 |
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