| Boreal Baltic narrow inlets |
| Estuaries |
| Large shallow inlets and bays |
| Mudflats and sandflats not covered by seawater at low tide |
| Posidonia beds (Posidonion oceanicae) |
| Reefs |
| Sandbanks which are slightly covered by seawater all the time |
| Submarine structures made by leaking gases |
| Submerged or partially submerged sea caves |
| <all other values> |