Species (sp.): Balanus sp.
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2014 | 1 | 1 | 1 | 1 |
| 2001 | 1 | 1 | 1 | 3 |
| 2000 | 1 | 2 | 2 | 4 |
| 1998 | 1 | 53 | 52 | 213 |
| 1997 | 1 | 75 | 70 | 499 |
| 1996 | 1 | 152 | 149 | 785 |
| 1995 | 1 | 190 | 175 | 1429 |
| 1994 | 1 | 1 | 1 | 1 |
| 1991 | 1 | 1 | 1 | 1 |
| Totalt alle år | 1 | 251 | 236 | 2936 |