Abietinaria Kirchenpauer, 1884 (basis of record)
Abietinaria abietina (Linnaeus, 1758) (basis of record)
Abietinaria filicula (Ellis & Solander, 1786) (basis of record)
Abietinaria interversa (Pictet & Bedot, 1900) (basis of record)
Abietinaria pulchra (Nutting, 1904) (basis of record)
Acaulis Stimpson, 1853 (basis of record)
Acaulis primarius Stimpson, 1853 (basis of record)
Acauloides Bouillon, 1965 (basis of record)
Acauloides ammisatum Bouillon, 1965 (basis of record)
Acauloides ilonae (Brinckmann-Voss, 1966) (basis of record)
Acryptolaria Norman, 1875 (basis of record)
Acryptolaria conferta (Allman, 1877) (basis of record)
Acryptolaria crassicaulis (Allman, 1888) (basis of record)
Acryptolaria longitheca (Allman, 1877) (basis of record)
Actigia Stechow, 1921 accepted as Coryne Gaertner, 1774 (basis of record)
Actigia vanbenedeni (Hincks, 1869) accepted as Coryne vanbenedenii Hincks, 1868 (basis of record)
Aegina Eschscholtz, 1829 (basis of record)
Aegina citrea Eschscholtz, 1829 (basis of record)
Aegina rosea Eschscholtz, 1829 (basis of record)
Aeginopsis Brandt, 1835 (basis of record)
Aeginopsis laurentii Brandt, 1838 (basis of record)
Aeginura Haeckel, 1879 (basis of record)
Aeginura grimaldii Maas, 1904 (basis of record)
Aequorea Péron & Lesueur, 1810 (basis of record)
Aequorea aequorea (Forsskål, 1775) accepted as Aequorea forskalea Péron & Lesueur, 1810 (basis of record)
Aequorea conica Browne, 1905 (basis of record)
Aequorea forskalea Péron & Lesueur, 1810 (basis of record)
Aequorea macrodactyla (Brandt, 1835) (basis of record)
Aequorea pensilis (Haeckel, 1879) (basis of record)
Aequorea vitrina Gosse, 1853 (basis of record)
Aglantha Haeckel, 1879 (basis of record)
Aglantha digitale (O. F. Müller, 1776) (basis of record)
Aglantha elata (Haeckel, 1879) (basis of record)
Aglaophenia Lamouroux, 1812 (basis of record)
Aglaophenia acacia Allman, 1883 (basis of record)
Aglaophenia elongata Meneghini, 1845 (basis of record)
Aglaophenia harpago Schenck, 1965 (basis of record)
Aglaophenia kirchenpaueri (Heller, 1868) (basis of record)
Aglaophenia latecarinata Allman, 1877 (basis of record)
Aglaophenia lophocarpa Allman, 1877 (basis of record)
Aglaophenia octodonta (Heller, 1868) (basis of record)
Aglaophenia parvula Bale, 1882 (basis of record)
Aglaophenia picardi Svoboda, 1979 (basis of record)
Aglaophenia pluma (Linnaeus, 1758) (basis of record)
Aglaophenia tubiformis Marktanner-Turneretscher, 1890 (basis of record)
Aglaophenia tubulifera (Hincks, 1861) (basis of record)
Aglaura Péron & Lesueur, 1810 (basis of record)
Aglaura hemistoma Péron & Lesueur, 1810 (basis of record)
Amalthaea Schmidt, 1852 accepted as Corymorpha M. Sars, 1835 (basis of record)
Amalthaea sarsii (Steenstup, 1854) accepted as Corymorpha sarsii Steenstrup, 1855 (basis of record)
Amphinema Haeckel, 1879 (basis of record)
Amphinema biscayana (Browne, 1907) (basis of record)
Amphinema dinema (Péron & Lesueur, 1810) (basis of record)
Amphinema krampi Russell, 1956 (basis of record)
Amphinema rubrum (Kramp, 1957) (basis of record)
Amphinema rugosum (Mayer, 1900) (basis of record)
Amphinema turrida (Mayer, 1900) (basis of record)
Amphisbetia L. Agassiz, 1862 (basis of record)
Amphisbetia operculata (Linnaeus, 1758) (basis of record)
Annatiara Russell, 1940 (basis of record)
Annatiara affinis (Hartlaub, 1914) (basis of record)
Antennella Allman, 1877 (basis of record)
Antennella paucinoda Fraser, 1935 accepted as Antennella quadriaurita Ritchie, 1909 (basis of record)
Antennella secundaria (Gmelin, 1791) (basis of record)
Antennella siliquosa (Hincks, 1877) (basis of record)
Anthohebella Boero, Bouillon & Kubota, 1997 (basis of record)
Anthohebella parasitica (Ciamician, 1880) (basis of record)
Arctapodema Dall, 1907 (basis of record)
Arctapodema ampla (Vanhöffen, 1902) (basis of record)
Armorhydra Swedmark & Teissier, 1958 (basis of record)
Armorhydra janowiczi Swedmark & Teissier, 1958 (basis of record)
Aselomaris Berrill, 1948 accepted as Rhizorhagium M. Sars, 1874 (basis of record)
Aselomaris arenosa (Alder, 1862) accepted as Rhizorhagium arenosum (Alder, 1862) (basis of record)
Aselomaris michaeli Berrill, 1948 accepted as Pachycordyle michaeli (Berrill, 1948) (basis of record)
Barcino Gili, Bouillon, Pages, Palanques & Puig, 1999 (basis of record)
Barcino foixensis Gili, Bouillon, Pagès, Palanques & Puig, 1999 (basis of record)
Bedotella Stechow, 1913 (basis of record)
Bedotella armata (Pictet & Bedot, 1900) (basis of record)
Bimeria Wright, 1859 (basis of record)
Bimeria vestita Wright, 1859 (basis of record)
Blackfordia Mayer, 1910 (basis of record)
Blackfordia virginica Mayer, 1910 (basis of record)
Bonneviella Broch, 1909 (basis of record)
Bonneviella grandis (Allman, 1876) (basis of record)
Boreohydra Westblad, 1937 accepted as Plotocnide Wagner, 1885 (basis of record)
Botrynema Browne, 1908 (basis of record)
Botrynema brucei Browne, 1908 (basis of record)
Botrynema ellinorae (Hartlaub, 1909) accepted as Botrynema brucei ellinorae (Hartlaub, 1909) (basis of record)
Bougainvillia Lesson, 1830 (basis of record)
Bougainvillia britannica (Forbes, 1841) (basis of record)
Bougainvillia charcoti Le Danois, 1913 accepted as Nemopsis bachei L. Agassiz, 1849 (basis of record)
Bougainvillia flavida Hartlaub, 1897 accepted as Bougainvillia britannica (Forbes, 1841) (basis of record)
Bougainvillia macloviana Lesson, 1830 (basis of record)
Bougainvillia multicilia (Haeckel, 1879) (basis of record)
Bougainvillia muscoides (Sars, 1846) (basis of record)
Bougainvillia muscus (Allman, 1863) (basis of record)
Bougainvillia principis (Steenstrup, 1850) (basis of record)
Bougainvillia pyramidata (Forbes & Goodsir, 1853) (basis of record)
Bougainvillia ramosa (Van Beneden, 1844) accepted as Bougainvillia muscus (Allman, 1863) (basis of record)
Bougainvillia rugosa Clarke, 1882 (basis of record)

Arctic Ocean for Abietinaria abietina (Linnaeus, 1758) 
Arctic Ocean for Abietinaria filicula (Ellis & Solander, 1786) 
Arctic Ocean for Acaulis primarius Stimpson, 1853 
Arctic Ocean for Aeginopsis laurentii Brandt, 1838 
Arctic Ocean for Aglantha digitale (O. F. Müller, 1776) 
Arctic Ocean for Amalthaea sarsii (Steenstup, 1854) 
Arctic Ocean for Bonneviella grandis (Allman, 1876) 
Arctic Ocean for Botrynema brucei Browne, 1908 
Arctic Ocean for Botrynema ellinorae (Hartlaub, 1909) 
Arctic Ocean for Bougainvillia principis (Steenstrup, 1850) 
Arctic Ocean for Bougainvillia superciliaris (L. Agassiz, 1849) 
Arctic Ocean for Campanularia volubilis (Linnaeus, 1758) 
Arctic Ocean for Candelabrum phrygium (Fabricius, 1780) 
Arctic Ocean for Catablema vesicarium (A. Agassiz, 1862) 
Arctic Ocean for Cladocarpus formosus Allman, 1877 
Arctic Ocean for Cladocarpus integer (Sars, 1873) 
Arctic Ocean for Clava multicornis (Forsskål, 1775) 
Arctic Ocean for Corymorpha glacialis M. Sars, 1860 
Arctic Ocean for Corymorpha groenlandica (Allman, 1876) 
Arctic Ocean for Corymorpha nana Alder, 1857  (inaccurate)
Arctic Ocean for Coryne brevicornis Bonnevie, 1898 
Arctic Ocean for Coryne hincksi Bonnevie, 1898 
Arctic Ocean for Cosmetira pilosella Forbes, 1848 
Arctic Ocean for Crossota norvegica Vanhöffen, 1902 
Arctic Ocean for Crossota rufobrunnea (Kramp, 1913) 
Arctic Ocean for Cuspidella humilis Hincks, 1866 
Arctic Ocean for Cuspidella procumbens Kramp, 1911 
Arctic Ocean for Cuspidella quadridentatum (Hincks, 1874) 
Arctic Ocean for Diphasia attenuata (Hincks, 1866) 
Arctic Ocean for Diphasia fallax (Johnston, 1847) 
Arctic Ocean for Dynamena pumila (Linnaeus, 1758) 
Arctic Ocean for Eudendrium annulatum Norman, 1864 
Arctic Ocean for Eudendrium insigne Hincks, 1861 
Arctic Ocean for Eudendrium racemosum (Cavolini, 1785)  (doubtful)
Arctic Ocean for Eudendrium rameum (Pallas, 1766) 
Arctic Ocean for Eudendrium tenellum Allman, 1877 
Arctic Ocean for Eudendrium vaginatum Allman, 1863 
Arctic Ocean for Euphysa aurata Forbes, 1848 
Arctic Ocean for Euphysa obvoluta (Kramp, 1933) 
Arctic Ocean for Euphysa tentaculata Linko, 1905 
Arctic Ocean for Filellum serpens (Hassall, 1848) 
Arctic Ocean for Grammaria abietina (Sars, 1851) 
Arctic Ocean for Grammaria immersa Nutting, 1901 
Arctic Ocean for Halecium birulai Spassky, 1929 
Arctic Ocean for Halecium corrugatum Nutting, 1899 
Arctic Ocean for Halecium curvicaule Lorenz, 1886 
Arctic Ocean for Halecium groenlandicum Kramp, 1911 
Arctic Ocean for Halecium labrosum Alder, 1859 
Arctic Ocean for Halecium minutum Broch, 1903 
Arctic Ocean for Halecium muricatum (Ellis & Solander, 1786) 
Arctic Ocean for Halecium ornatum Nutting, 1901 
Arctic Ocean for Haliscera bigelowi Kramp, 1947 
Arctic Ocean for Halitholus pauper Hartlaub, 1914 
Arctic Ocean for Halitholus yoldiaarcticae (Birula, 1897) 
Arctic Ocean for Halopsis ocellata Agassiz, 1865 
Arctic Ocean for Homoeonema platygonon Maas, 1893 
Arctic Ocean for Hydractinia allmanii Bonnevie, 1898 
Arctic Ocean for Hydractinia arctica (Jäderholm, 1902) 
Arctic Ocean for Hydractinia carica Bergh, 1887 
Arctic Ocean for Hydractinia echinata (Fleming, 1828) 
Arctic Ocean for Hydractinia monocarpa Allman, 1876 
Arctic Ocean for Hydractinia serrata Kramp, 1943 
Arctic Ocean for Lafoea grandis Hincks, 1874 
Arctic Ocean for Lafoeina maxima Levinsen, 1893 
Arctic Ocean for Lafoeina tenuis Sars, 1874 
Arctic Ocean for Laomedea flexuosa Alder, 1857 
Arctic Ocean for Leuckartiara abyssi (G.O. Sars, 1874) 
Arctic Ocean for Leuckartiara breviconis (Murbach & Shearer, 1902) 
Arctic Ocean for Leuckartiara nobilis Hartlaub, 1914 
Arctic Ocean for Lovenella producta (G.O. Sars, 1874) 
Arctic Ocean for Melicertum octocostatum (M. Sars, 1835) 
Arctic Ocean for Merona nematophorum (Antsulevich, 1986) 
Arctic Ocean for Monobrachium parasitum Mereschkowsky, 1877 
Arctic Ocean for Monocoryne gigantea (Bonnevie, 1898) 
Arctic Ocean for Neoturris pileata (Forsskål, 1775) 
Arctic Ocean for Opercularella lacerata (Johnston, 1847) 
Arctic Ocean for Opercularella pumila Clark, 1875 
Arctic Ocean for Paratiara digitalis Kramp & Damas, 1925 
Arctic Ocean for Polyplumaria gracillima (G.O. Sars, 1873) 
Arctic Ocean for Ptychogastria polaris Allman, 1878 
Arctic Ocean for Ptychogena lactea Agassiz, 1865 
Arctic Ocean for Rhizocaulus verticillatus (Linnaeus, 1758) 
Arctic Ocean for Rhizorhagium roseum M. Sars, 1874 
Arctic Ocean for Sarsia barentsi Linko, 1905 
Arctic Ocean for Sarsia lovenii (M. Sars, 1846) 
Arctic Ocean for Sarsia princeps (Haeckel, 1879) 
Arctic Ocean for Sarsia producta (Wright, 1858) 
Arctic Ocean for Sarsia tubulosa (M. Sars, 1835) 
Arctic Ocean for Schizotricha frutescens (Ellis & Solander, 1786) 
Arctic Ocean for Schizotricha polaris Naumov, 1960 
Arctic Ocean for Schizotricha variabilis (Bonnevie, 1899) 
Arctic Ocean for Sertularella rugosa (Linnaeus, 1758) 
Arctic Ocean for Sertularia albimaris Mereschkowsky, 1877 
Arctic Ocean for Sertularia cupressina Linnaeus, 1758 
Arctic Ocean for Sertularia fabricii Levinsen, 1893 
Arctic Ocean for Sertularia mirabilis (Verrill, 1873) 
Arctic Ocean for Sertularia plumosa (Clark, 1876) 
Arctic Ocean for Sertularia robusta (Clark, 1877) 
Arctic Ocean for Sertularia schmidti Kudelin, 1914 
Arctic Ocean for Sertularia tenera G. O. Sars, 1874 

 Status

 for Tiaranna globulosa (Forbes, 1848)

unrecognizable species [details]

 Taxonomic remark

 for Cunina vitrea Gegenbaur, 1857

Juvenile type specimens [details]

 Taxonomy

 for Bougainvillia charcoti Le Danois, 1913

unrecognizable [details]

 Taxonomy

 for Bougainvillia flavida Hartlaub, 1897

unrecognizable [details]

 Taxonomy

 for Clytia raridentata (Alder in Hincks, 1861)

dubious species [details]

 Taxonomy

 for Cunina lativentris Gegenbaur, 1857

dubious species [details]

 Taxonomy

 for Dipurena dolichogaster Haeckel, 1864

unrecognizable species, is either Stauridiosarsia ophiogaster or St. reesi. [details]

 Taxonomy

 for Eudendrium tenellum Allman, 1877

dubious species [details]

 Taxonomy

 for Laodicea chapmani Günther, 1903

unrecognizable [details]

 Taxonomy

 for Laodicea ocellata Babnik, 1948

unrecognizable [details]

 Taxonomy

 for Sarsia barentsi Linko, 1905

dubious species, likely a juvenile [details]

 Taxonomy

 for Sminthea arctica (Hartlaub, 1909)

dubious species [details]

 Taxonomy

 for Tiaranna ducalis (Forbes & Goodsir, 1853)

unrecognizable [details]