Between brackets is the number of accepted marine extant species
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Shows the number of accepted marine extant species within the taxon
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- Biota (247 184)
- Kingdom Animalia (211 162)
- Subkingdom Animalia incertae sedis
- Subkingdom Metazoa accepted as Animalia
- Phylum Acanthocephala (516)
- Phylum Annelida (14 065)
- Phylum Arthropoda (59 645)
- Phylum Aschelminthes
- Phylum Brachiopoda (407)
- Phylum Bryozoa (6 529)
- Phylum Cephalorhyncha
- Phylum Chaetognatha (132)
- Phylum Chordata (24 075)
- Phylum Cnidaria (12 560)
- Subphylum Anthozoa (7 256)
- Class Anthozoa incertae sedis
- Class Hexacorallia (3 655)
- Order Actiniaria (1 172)
- Suborder Anenthemonae (133)
- Suborder Endocoelantheae accepted as Actinernoidea Stephenson, 1922
- Suborder Enthemonae (992)
- Superfamily Actinioidea Rafinesque, 1815 (447)
- Family Actiniidae Rafinesque, 1815 (335)
- Genus Actinactis accepted as Asteractis Verrill, 1869
- Genus Actinea accepted as Actinia Linnaeus, 1767
- Species Actinea alba accepted as Sagartia alba (Cocks in Johnston, 1847)
- Species Actinea alderi Cocks, 1851 accepted as Actinothoe alderi (Cocks, 1851)
- Species Actinea anguicoma accepted as Actinothoe anguicoma (Price in Johnston, 1847)
- Species Actinea balii Cocks, 1851 accepted as Anthopleura ballii (Cocks, 1851)
- Species Actinea ballii accepted as Anthopleura ballii (Cocks, 1851)
- Species Actinea bellii (Cocks, 1851) accepted as Actinothoe bellii (Cocks, 1851)
- Species Actinea bellis (Pennant, 1777) accepted as Cereus pedunculatus (Pennant, 1777)
- Species Actinea biserialis accepted as Aiptasia mutabilis (Gravenhorst, 1831)
- Species Actinea chiococca accepted as Actinia equina (Linnaeus, 1758)
- Species Actinea chrysanthellum accepted as Halcampa chrysanthellum (Peach in Johnston, 1847)
- Species Actinea chrysosplenum accepted as Chrysoela chrysosplenium (Cocks in Johnson, 1847)
- Species Actinea chrysosplinum accepted as Chrysoela chrysosplenium (Cocks in Johnson, 1847)
- Species Actinea coriacea accepted as Urticina felina (Linnaeus, 1761)
- Species Actinea crassicornis accepted as Hormathia digitata (O.F. Müller, 1776)
- Species Actinea crassicornis accepted as Urticina felina (Linnaeus, 1761)
- Species Actinea dianthus accepted as Metridium senile (Linnaeus, 1761)
- Species Actinea gemmacea accepted as Aulactinia verrucosa (Pennant, 1777)
- Species Actinea johstoni accepted as Cereus pedunculatus (Pennant, 1777)
- Species Actinea margaritifera accepted as Actinia equina (Linnaeus, 1758)
- Species Actinea mesembryanthemum accepted as Actinia equina (Linnaeus, 1758)
- Species Actinea monile accepted as Anthopleura monile (Templeton, 1836)
- Species Actinea parasitica accepted as Calliactis parasitica (Couch, 1842)
- Species Actinea pelucida Cocks, 1851 accepted as Actinothoe pellucida (Cocks, 1851)
- Species Actinea templetonii accepted as Cereus pedunculatus (Pennant, 1777)
- Species Actinea troglodytes accepted as Sagartia troglodytes (Price in Johnston, 1847)
- Species Actinea tuberculata accepted as Urticina tuberculata (Cocks, 1851)
- Species Actinea viduata accepted as Sagartiogeton viduatus (Müller, 1776)
- Species Actinea yarrellii
- Genus Actinia Linnaeus, 1767 (63)
- Genus Actiniodes accepted as Actinioides Haddon & Shackleton, 1893
- Genus Actiniogeton Carlgren, 1938 accepted as Gyractis Boveri, 1893
- Genus Actinioides Haddon & Shackleton, 1893
- Genus Actinogeton Carlgren, 1938 accepted as Gyractis Boveri, 1893
- Genus Actinoides accepted as Actinioides Haddon & Shackleton, 1893
- Genus Actinopsis Dana, 1856 (1)
- Genus Actinostella Duchassaing, 1850 (6)
- Genus Anemone accepted as Anemonia Risso, 1827
- Genus Anemonia Risso, 1827 (21)
- Genus Anenonia accepted as Anemonia Risso, 1827
- Genus Antheopis Simon, 1892 accepted as Antheopsis Simon, 1892
- Genus Antheopsis Simon, 1892 (2)
- Genus Anthopleura Duchassaing de Fonbressin & Michelotti, 1860 (49)
- Genus Anthostella Carlgren, 1938 (2)
- Genus Anthpleura accepted as Anthopleura Duchassaing de Fonbressin & Michelotti, 1860
- Genus Asteractis Verrill, 1869
- Genus Aulactinia Agassiz in Verrill, 1864 (9)
- Genus Bolocera Gosse, 1860 (9)
- Genus Boloceropsis McMurrich, 1904 (1)
- Genus Bulocera accepted as Bolocera Gosse, 1860
- Genus Bunodactis Verrill, 1899 (20)
- Genus Bunodella Pfeffer, 1889 accepted as Parantheopsis McMurrich, 1904
- Genus Bunodella Verrill, 1899 accepted as Isoaulactinia Belém, Herrera Moreno & Schlenz, 1996
- Genus Bunodes accepted as Urticina Ehrenberg, 1834
- Genus Bunodosma accepted as Bunodosoma Verrill, 1899
- Genus Bunodosoma Verrill, 1899 (13)
- Genus Cancrisocia Stimpson, 1856 (1)
- Genus Ceratactis Milne Edwards, 1857 accepted as Anemonia Risso, 1827
- Genus Cereactis Andres, 1881
- Genus Cladactella Verrill, 1928 (2)
- Genus Cladactis Verrill, 1869
- Genus Cnidopus Carlgren, 1934 accepted as Epiactis Verrill, 1869
- Genus Codylactis accepted as Condylactis Duchassaing de Fombressin & Michelotti, 1864
- Genus Comactis Milne Edwards, 1857
- Genus Condylactis Duchassaing de Fombressin & Michelotti, 1864 (4)
- Genus Crambactis Haeckel, 1876
- Genus Crambractis accepted as Crambactis Haeckel, 1876
- Genus Cribina accepted as Cribrina Hemprich & Ehrenberg in Ehrenberg, 1834
- Genus Cribrina Hemprich & Ehrenberg in Ehrenberg, 1834 (2)
- Genus Cribrinopsis Carlgren, 1921 (9)
- Genus Cribrionopsis accepted as Cribrinopsis Carlgren, 1921
- Genus Diplactis McMurrich, 1889
- Genus Dofelinia accepted as Dofleinia Wassilieff, 1908
- Genus Dofleina accepted as Dofleinia Wassilieff, 1908
- Genus Dofleinia Wassilieff, 1908 (1)
- Genus Doflenia accepted as Dofleinia Wassilieff, 1908
- Genus Ectacmaea Ehrenberg, 1834
- Genus Entacmaea Ehrenberg, 1834 (2)
- Genus Entacmea accepted as Entacmaea Ehrenberg, 1834
- Genus Epiactis Verrill, 1869 (19)
- Genus Epigonactis Verrill, 1899 accepted as Epiactis Verrill, 1869
- Genus Eubolocera Verrill, 1922 accepted as Liponema Hertwig, 1882
- Genus Eucladactis Verrill, 1899
- Genus Evactis Verrill, 1869
- Genus Glyphoperidium Roule, 1909 (1)
- Genus Glyphostylum Roule, 1909 accepted as Glyphoperidium Roule, 1909
- Genus Gyractis Boveri, 1893 (2)
- Genus Gyrostoma Kwietniewski, 1897 (11)
- Genus Gysostoma accepted as Gyrostoma Kwietniewski, 1897
- Genus Henactis Rodríguez, 2012 (1)
- Genus Isactinia Carlgren, 1900 (3)
- Genus Isadamsia Carlgren, 1928 accepted as Stylobates Dall, 1903
- Genus Isanemonia Carlgren, 1950 (1)
- Genus Isantheopsis Carlgren, 1942 (1)
- Genus Isoaulactinia Belém, Herrera Moreno & Schlenz, 1996 (2)
- Genus Isocradactis Carlgren, 1924
- Genus Isosicyonis Carlgren, 1927 (2)
- Genus Isotealia Carlgren, 1899 (2)
- Genus Isoulactis
- Genus Korsaranthus Riemann-Zürneck & Griffiths, 1999 (1)
- Genus Leipsiceras Stephenson, 1918 (2)
- Genus Lophactis Verrill, 1869
- Genus Macrodactyla Haddon, 1898 (2)
- Genus Madoniactis Danielssen, 1890 accepted as Urticina Ehrenberg, 1834
- Genus Mesactinia England, 1987 (1)
- Genus Myonanthus McMurrich, 1893 (2)
- Genus Neocondylactis England, 1987 accepted as Paracondylactis Carlgren, 1934
- Genus Neoparacondylactis Zamponi, 1974 (1)
- Genus Onubactis López-González, den Hartog & García-Gómez, 1995 (1)
- Genus Oulactis Milne Edwards & Haime, 1851 (7)
- Genus Parabunodactis Carlgren, 1928 (2)
- Genus Paracondylactis Carlgren, 1934 (3)
- Genus Paranemonia Carlgren, 1900 (2)
- Genus Parantheopsis McMurrich, 1904 (4)
- Genus Paratealia Mathew & Kurian, 1979 (1)
- Genus Phialoba Carlgren, 1951 (1)
- Genus Phlyctenactis Stuckey, 1909 (2)
- Genus Phlyctenanthus Carlgren, 1950 (2)
- Genus Phyctenanthus accepted as Phlyctenanthus Carlgren, 1950
- Genus Phylactis accepted as Phyllactis Milne Edwards & Haime, 1851
- Genus Phyllactis Milne Edwards & Haime, 1851 accepted as Actinostella Duchassaing, 1850 (2)
- Genus Phymactis Milne Edwards, 1857 (6)
- Genus Phymantea accepted as Phymanthea
- Genus Phymanthea (1)
- Genus Physobrachia Saville-Kent, 1893 accepted as Entacmaea Ehrenberg, 1834
- Genus Polystomidia accepted as Polystomidium Hertwig, 1882
- Genus Polystomidium Hertwig, 1882 accepted as Bolocera Gosse, 1860
- Genus Pseudactinia Carlgren, 1928 (4)
- Genus Pseudophellia Verrill, 1899
- Genus Psychobrachia Saville-Kent, 1893 accepted as Physobrachia Saville-Kent, 1893
- Genus Rhodactinia Agassiz, 1847
- Genus Rivetia Pax, 1912
- Genus Saccactis accepted as Oulactis Milne Edwards & Haime, 1851
- Genus Spheractis England, 1992 (1)
- Genus Stylobates Dall, 1903 (5)
- Genus Synantheopsis England, 1992 (2)
- Genus Tealia Gosse, 1858
- Genus Tealianthus Carlgren, 1927 (1)
- Genus Telactinia England, 1987 accepted as Isactinia Carlgren, 1900
- Genus Urticina Ehrenberg, 1834 (15)
- Genus Urticinopsis Carlgren, 1927 (2)
- Family Actinodendridae Haddon, 1898 (9)
- Family Andresiidae Stephenson, 1922 (1)
- Family Aurelianiidae Andres, 1883 accepted as Capneidae Gosse, 1860
- Family Condylanthidae Stephenson, 1922 (11)
- Family Haloclavidae Verrill, 1899 (17)
- Family Harenactidae Hamilton, Daly & Rodríguez, 2022 (3)
- Family Heteractidae Andres, 1883 (1)
- Family Heteranthidae Carlgren, 1900 (1)
- Family Homostichanthidae Carlgren, 1900 (1)
- Family Iosactiidae Riemann-Zürneck, 1997 accepted as Iosactinidae Riemann-Zürneck, 1997
- Family Iosactinidae Riemann-Zürneck, 1997 (2)
- Family Limnactiniidae Carlgren, 1921 (2)
- Family Liponematidae Hertwig, 1882 (4)
- Family Minyadidae Milne Edwards, 1857 (8)
- Family Oractiidae Riemann-Zürneck, 2000 (3)
- Family Peachiidae Hamilton, Daly & Rodríguez, 2022 (17)
- Family Phymanthidae Andres, 1883 (11)
- Family Preactiniidae England in England & Robson, 1984 (2)
- Family Ptychodactinidae Appellöf, 1893 (2)
- Family Stichodactylidae Andres, 1883 (9)
- Family Stoichactidae Carlgren, 1900 accepted as Stichodactylidae Andres, 1883
- Family Thalassianthidae Milne Edwards, 1857 (8)
- Superfamily Actinioidea Rodríguez & Daly in Rodríguez et al., 2014 accepted as Actinioidea Rafinesque, 1815
- Superfamily Actinostoloidea Carlgren, 1932 (95)
- Superfamily Mesomyaria Stephenson, 1921 accepted as Actinostoloidea Carlgren, 1932
- Superfamily Metridioidea Carlgren, 1893 (450)
- Superfamily Metridioidea Rodríguez & Daly in Rodríguez et al., 2014 accepted as Metridioidea Carlgren, 1893
- Suborder Helenmonae (1)
- Suborder Nynantheae accepted as Enthemonae (2)
- Suborder Protantheae accepted as Gonactiniidae Carlgren, 1893
- Suborder Ptychodacteae accepted as Ptychodactinidae Appellöf, 1893
- Superfamily Actiniaria incertae sedis (44)
- Order Antipatharia (301)
- Order Ceriantharia (140)
- Order Ceriantipatharia
- Order Corallimorpharia (48)
- Order Coralliomorpharia accepted as Corallimorpharia
- Order Ptychodactiaria accepted as Actiniaria
- Order Scleractinia (1 703)
- Order Zoantharia (291)
- Order Zoanthidea accepted as Zoantharia
- Order Zoanthiniaria accepted as Zoantharia
- Class Octocorallia (3 601)
- Class Zoantharia accepted as Hexacorallia
- Subphylum Cnidaria incertae sedis (1)
- Subphylum Endocnidozoa (1 151)
- Subphylum Medusozoa (4 152)
- Phylum Ctenophora (184)
- Phylum Cycliophora (2)
- Phylum Dicyemida (122)
- Phylum Echinodermata (7 626)
- Phylum Ectoprocta accepted as Bryozoa
- Phylum Entoprocta (201)
- Phylum Gastrotricha (522)
- Phylum Gnathostomulida (100)
- Phylum Hemichordata (133)
- Phylum Kinorhyncha (348)
- Phylum Loricifera (46)
- Phylum Mesozoa accepted as Dicyemida
- Phylum Mollusca (51 964)
- Phylum Nematoda (6 756)
- Phylum Nematomorpha (6)
- Phylum Nemertea (1 340)
- Phylum Nemertina represented as Nemertea
- Phylum Nemertini accepted as Nemertea
- Phylum Orthonectida (24)
- Phylum Pentastomida accepted as Pentastomida
- Phylum Phoronida (13)
- Phylum Placozoa (4)
- Phylum Platyhelminthes (13 499)
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera (9 437)
- Phylum Priapulida (22)
- Phylum Rotatoria accepted as Rotifera
- Phylum Rotifera (184)
- Phylum Sipunculida accepted as Sipuncula
- Phylum Tardigrada (263)
- Phylum Xenacoelomorpha (437)
- Kingdom Archaea (117)
- Kingdom Bacteria (2 223)
- Kingdom Chromista (20 780)
- Kingdom Fungi (1 432)
- Kingdom Monera represented as Bacteria
- Kingdom Plantae (10 578)
- Kingdom Protozoa (766)
- Kingdom Viruses (115)