| Acipenser oxyrinchus | Gulf sturgeon | Fish and lamprey species | migratory | No | occasional monitoring program | scientists, universities in partnership with the management structure | RE | SIS | WORMS |
| Alca torda | Razorbill | Birds | wintering | Yes | regular monitoring | scientists, universities in partnership with the management structure | - | SIS | WORMS |
| Alosa fallax | Twaite shad | Fish and lamprey species | migratory | No | occasional monitoring program | scientists, universities in partnership with the management structure | LC | SIS | WORMS |
| Cepphus grylle arcticus | Black guillemot | Birds | wintering | Yes | regular monitoring | scientists, universities in partnership with the management structure | LC | SIS | WORMS |
| Cepphus grylle grylle | Black guillemot | Birds | wintering | Yes | regular monitoring | scientists, universities in partnership with the management structure | NT | SIS | WORMS |
| Clangula hyemalis | Long-tailed duck | Birds | wintering | Yes | regular monitoring | scientists, universities in partnership with the management structure | EN | SIS | WORMS |
| Gavia arctica | Black-throated diver | Birds | wintering | Yes | regular monitoring | scientists, universities in partnership with the management structure | CR | SIS | WORMS |
| Gavia stellata | Red-throated diver | Birds | wintering | Yes | regular monitoring | scientists, universities in partnership with the management structure | CR | SIS | WORMS |
| Halichoerus grypus | Grey seal | Mammals | occasional | No | occasional monitoring program | scientists, universities in partnership with the management structure | LC | SIS | WORMS |
| Hydrocoloeus minutus | Little gull | Birds | migratory | Yes | regular monitoring | scientists, universities in partnership with the management structure | NT | SIS | WORMS |
| Larus argentatus | Herring gull | Birds | migratory | Yes | regular monitoring | scientists, universities in partnership with the management structure | - | SIS | WORMS |
| Larus canus | Mew gull | Birds | migratory | Yes | regular monitoring | scientists, universities in partnership with the management structure | - | SIS | WORMS |
| Larus fuscus fuscus | Lesser black-backed gull | Birds | migratory | Yes | regular monitoring | scientists, universities in partnership with the management structure | VU | SIS | WORMS |
| Larus marinus | Greater black-backed gull | Birds | migratory | Yes | regular monitoring | scientists, universities in partnership with the management structure | - | SIS | WORMS |
| Melanitta fusca | Velvet scoter | Birds | wintering | Yes | regular monitoring | scientists, universities in partnership with the management structure | VU | SIS | WORMS |
| Melanitta nigra | Common scoter | Birds | not reported | Yes | regular monitoring | scientists, universities in partnership with the management structure | EN | SIS | WORMS |
| Phalacrocorax carbo sinensis | Long-tailed cormorant | Birds | migratory | Yes | regular monitoring | scientists, universities in partnership with the management structure | - | SIS | WORMS |
| Phocoena phocoena (Baltic Sea subpop) | Harbour porpoise | Mammals | occasional | Yes | regular monitoring | scientists, universities in partnership with the management structure | CR | SIS | WORMS |
| Phocoena phocoena (Western Baltic subpop) | Harbour porpoise | Mammals | migratory | Yes | regular monitoring | scientists, universities in partnership with the management structure | VU | SIS | WORMS |
| Podiceps auritus | Horned grebe | Birds | wintering | Yes | regular monitoring | scientists, universities in partnership with the management structure | NT | SIS | WORMS |
| Podiceps cristatus | Great-crested grebe | Birds | migratory | Yes | regular monitoring | scientists, universities in partnership with the management structure | - | SIS | WORMS |
| Podiceps grisegena | Red-necked grebe | Birds | wintering | Yes | regular monitoring | scientists, universities in partnership with the management structure | EN | SIS | WORMS |
| Somateria mollissima | Common eider | Birds | wintering | Yes | regular monitoring | scientists, universities in partnership with the management structure | VU | SIS | WORMS |
| Uria aalge | Guillemot | Birds | wintering | Yes | regular monitoring | scientists, universities in partnership with the management structure | - | SIS | WORMS |