Acanthodoris pilosa (Abildgaard, 1789) (additional source)
Achnanthes longipes C.Agardh, 1824 (basis of record)
Actinoptychus senarius (Ehrenberg) Ehrenberg, 1843 accepted as Actinocyclus senarius Ehrenberg, 1838 (additional source)
Actinostola callosa (Verrill, 1882) (additional source)
Actitis macularius Linnaeus, 1766 (additional source)
Aega psora (Linnaeus, 1758) (additional source)
Aetea anguina (Linnaeus, 1758) (additional source)
Agalma elegans (M. Sars, 1846) (additional source)
Ahnfeltia plicata (Hudson) E.M.Fries, 1836 (additional source)
Alaria esculenta (Linnaeus) Greville, 1830 (additional source)
Alca torda Linnaeus, 1758 (additional source)
Alcyonium digitatum Linnaeus, 1758 (additional source)
Alle alle (Linnaeus, 1758) (additional source)
Ampharete acutifrons (Grube, 1860) (additional source)
Amphipholis squamata (Delle Chiaje, 1828) (additional source)
Amphiporus bioculatus sensu Verrill, 1892 (additional source)
Amphitrite johnstoni Malmgren, 1866 accepted as Neoamphitrite figulus (Dalyell, 1853) (additional source)
Anas acuta Linnaeus, 1758 (additional source)
Anas americana Gmelin, 1789 (additional source)
Anas clypeata Linnaeus, 1758 accepted as Spatula clypeata (Linnaeus, 1758) (additional source)
Anas discors Linnaeus, 1766 accepted as Spatula discors (Linnaeus, 1766) (additional source)
Anas penelope Linnaeus, 1758 accepted as Mareca penelope (Linnaeus, 1758) (additional source)
Anas platyrhynchos Linnaeus, 1758 (additional source)
Anas rubripes Brewster, 1902 (additional source)
Anas strepera Linnaeus, 1758 (additional source)
Anobothrus gracilis (Malmgren, 1866) (additional source)
Anomia simplex A. d'Orbigny, 1853 (additional source)
Ardea alba Linnaeus, 1758 (additional source)
Arenaria interpres (Linnaeus, 1758) (additional source)
Ascophyllum nodosum (Linnaeus) Le Jolis, 1863 (additional source)
Astarte borealis (Schumacher, 1817) accepted as Tridonta borealis Schumacher, 1817 (additional source)
Astyris rosacea (A. Gould, 1840) (additional source)
Aurelia aurita (Linnaeus, 1758) (additional source)
Aythya affinis (Eyton, 1838) (additional source)
Aythya collaris (Donovan, 1809) (additional source)
Aythya marila (Linnaeus, 1761) (additional source)
Bacillaria paxillifer (O.F.Müller) T.Marsson, 1901 accepted as Vibrio paxillifer O.F.Müller, 1786 (additional source)
Balaenoptera acutorostrata Lacépède, 1804 (additional source)
Balaenoptera borealis Lesson, 1828 (additional source)
Biddulphia alternans (Bailey) Van Heurck, 1885 accepted as Trigonium alternans (Bailey) A.Mann, 1907 accepted as Triceratium alternans f. alternans J.W. Bailey, 1851 (additional source)
Blidingia marginata (J.Agardh) P.J.L.Dangeard ex Bliding, 1963 (additional source)
Blidingia minima (Nägeli ex Kützing) Kylin, 1947 (additional source)
Bolinopsis infundibulum (O.F. Müller, 1776) (additional source)
Boltenia echinata (Linnaeus, 1767) (additional source)
Bopyroides hippolytes (Kröyer, 1838) (additional source)
Boreocingula castanea (Møller, 1842) (additional source)
Boreotrophon clathratus (Linnaeus, 1767) (additional source)
Boreotrophon truncatus (Strøm, 1768) (additional source)
Botaurus lentiginosus (Rackett, 1813) (additional source)
Botryllus schlosseri (Pallas, 1766) (additional source)
Bougainvillia superciliaris (L. Agassiz, 1849) (additional source)
Branta bernicla (Linnaeus, 1758) (additional source)
Branta canadensis (Linnaeus, 1758) (additional source)
Bucephala albeola (Linnaeus, 1758) (additional source)
Bucephala clangula (Linnaeus, 1758) (additional source)
Bucephala islandica (Gmelin, 1789) (additional source)
Bugula simplex Hincks, 1886 accepted as Bugulina simplex (Hincks, 1886) (additional source)
Caberea ellisii (Fleming, 1814) (additional source)
Calidris alba (Pallas, 1764) (additional source)
Calidris alpina (Linnaeus, 1758) (additional source)
Calidris bairdii (Coues, 1861) (additional source)
Calidris canutus (Linnaeus, 1758) (additional source)
Calidris ferruginea (Pontoppidan, 1763) (additional source)
Calidris fuscicollis (Vieillot, 1819) (additional source)
Calidris himantopus (Bonaparte, 1826) (additional source)
Calidris maritima (Brünnich, 1764) (additional source)
Calidris melanotos (Vieillot, 1819) (additional source)
Calidris minutilla (Vieillot, 1819) (additional source)
Calidris pusilla (Linnaeus, 1766) (additional source)
Calothrix confervicola C.Agardh ex Bornet & Flahault, 1886 (additional source)
Catharacta skua Brünnich, 1764 accepted as Stercorarius skua (Brünnich, 1764) (additional source)
Cepphus grylle (Linnaeus, 1758) (additional source)
Cerataulina pelagica (Cleve) Hendey, 1937 accepted as Cerataulina bergonii Ostenfeld, 1903 (additional source)
Cerebratulus lacteus (Leidy, 1851) (additional source)
Cerebratulus marginatus Renier, 1804 (additional source)
Chaetoceros compressus Lauder, 1864 (additional source)
Chaetoceros concavicornis Mangin, 1917 (additional source)
Chaetoceros constrictus Gran, 1897 (basis of record)
Chaetoceros convolutus Castracane, 1886 (additional source)
Chaetoceros danicus Cleve, 1889 (additional source)
Chaetoceros debilis Cleve, 1894 emend Xu, Y.Li & Lundholm in Xu et al., 2020 (additional source)
Chaetoceros decipiens Cleve, 1873 (additional source)
Chaetoceros diadema (Ehrenberg) Gran, 1897 accepted as Syndendrium diadema Ehrenberg, 1854 † (additional source)
Chaetoceros laciniosus F.Schütt, 1895 (additional source)
Chaetoceros simplex Ostenfeld, 1902 (additional source)
Chaetoceros socialis H.S.Lauder, 1864 (additional source)
Chaetoceros teres Cleve, 1896 (additional source)
Chaetoceros willei Gran, 1897 (basis of record)
Charadrius semipalmatus Bonaparte, 1825 (additional source)
Charadrius vociferus Linnaeus, 1758 (additional source)
Chlidonias niger (Linnaeus, 1758) (additional source)
Chondrus crispus Stackhouse, 1797 (additional source)
Chorda filum (Linnaeus) Stackhouse, 1797 (additional source)
Chorda tomentosa Lyngbye, 1819 accepted as Halosiphon tomentosus (Lyngbye) Jaasund, 1957 (additional source)
Chordaria flagelliformis (O.F.Müller) C.Agardh, 1817 (additional source)
Choreocolax polysiphoniae Reinsch, 1875 (additional source)
Ciona intestinalis (Linnaeus, 1767) (additional source)
Cladophora fracta (O.F.Müller ex Vahl) Kützing, 1843 (additional source)
Cladophora laetevirens (Dillwyn) Kützing, 1843 (additional source)
Cladophora rupestris (Linnaeus) Kützing, 1843 (additional source)