Order: Hydroider (Hydroidea)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2014 | 1 | 1 | 1 | 1 |
| 2013 | 1 | 1 | 1 | 1 |
| 2002 | 2 | 2 | 2 | 3 |
| 2001 | 2 | 2 | 2 | 18 |
| 2000 | 1 | 1 | 1 | 2 |
| 1992 | 1 | 1 | 1 | 1 |
| 1991 | 1 | 1 | 1 | 1 |
| 1990 | 1 | 1 | 1 | 1 |
| 1989 | 1 | 11 | 11 | 11 |
| Totalt alle år | 5 | 19 | 19 | 39 |
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2014 | 1 | 1 | 1 | 1 |
| 2013 | 1 | 1 | 1 | 1 |
| 2002 | 2 | 2 | 2 | 3 |
| 2001 | 2 | 2 | 2 | 18 |
| 2000 | 1 | 1 | 1 | 2 |
| 1992 | 1 | 1 | 1 | 1 |
| 1991 | 1 | 1 | 1 | 1 |
| 1990 | 1 | 1 | 1 | 1 |
| 1989 | 1 | 11 | 11 | 11 |
| Totalt alle år | 5 | 19 | 19 | 39 |