Traits Taxon list
Bouillonactinia carcinicola (Hiro, 1939)
Bouillonactinia hooperii (Sigerfoos, 1899)
Bouillonactinia misakiensis (Iwasa, 1934)
Bouillonactinia multigranosi (Namikawa, 1991)
Clava multicornis (Forsskål, 1775)
Clavactinia gallensis Thornely, 1904
Clavactinia rubricata (Schuchert, 1996)
Clavactinia serrata (Kramp, 1943)
Cnidostoma fallax Vanhöffen, 1911
Distichozoon dens Cairns, 2015
Fiordlandia protecta Schuchert, 1996
Hydractinia aculeata (Wagner, 1833)
Hydractinia aggregata Fraser, 1911
Hydractinia altispina Millard, 1955
Hydractinia anechinata (Ritchie, 1907) accepted as Podocoryna anechinata Ritchie, 1907
Hydractinia angusta Hartlaub, 1904
Hydractinia apicata (Kramp, 1959) accepted as Podocoryna apicata Kramp, 1959
Hydractinia arctica (Jäderholm, 1902)
Hydractinia arge (Clarke, 1882)
Hydractinia armata Fraser, 1940
Hydractinia bayeri Hirohito, 1984
Hydractinia betkensis (Watson, 1978)
Hydractinia brachyurae (Hirohito, 1988)
Hydractinia californica Torrey, 1904
Hydractinia canalifera Millard, 1957
Hydractinia carica Bergh, 1887
Hydractinia carnea (M. Sars, 1846) accepted as Podocoryna carnea M. Sars, 1846
Hydractinia carolinae Fraser, 1912
Hydractinia constrictura Huang, Xu & Guo, 2015 (unaccepted > unavailable name )
Hydractinia cryptogonia Hirohito, 1988
Hydractinia cytaeiformis Vervoort, 2006
Hydractinia dendritica Hickson & Gravely, 1907
Hydractinia denhami (Thornely, 1904) accepted as Podocoryna denhami Thornely, 1904
Hydractinia diogenes Millard, 1959
Hydractinia disjuncta Fraser, 1938
Hydractinia dongshanensis Xu & Huang, 2006 accepted as Podocoryna dongshanensis (Xu & Huang, 2006)
Hydractinia echinata (Fleming, 1828)
Hydractinia epidocleensis Leloup, 1931
Hydractinia epispongia Fraser, 1938
Hydractinia galeai Calder & Watling, 2021
Hydractinia gelinea Watson, 2015
Hydractinia gorgonoides (Nutting, 1906)
Hydractinia granulata Hirohito, 1988
Hydractinia guangxiensis Huang, Li & Zhang, 2010 accepted as Podocoryna guangxiensis (Huang, Li & Zhang, 2010)
Hydractinia hancocki Fraser, 1938
Hydractinia inabai (Hirohito, 1988) accepted as Bouillonactinia misakiensis (Iwasa, 1934)
Hydractinia ingolfi (Kramp, 1932)
Hydractinia kaffraria Millard, 1955
Hydractinia laevispina Fraser, 1922
Hydractinia leizhouensis Huang, Zhang & Yang, 2020 accepted as Podocoryna leizhouensis (Huang, Zhang & Yang, 2020)
Hydractinia longispina Fraser, 1938
Hydractinia mar (Gasca & Calder, 1993)
Hydractinia marsupialia Millard, 1975
Hydractinia michaelseni Broch, 1914
Hydractinia minoi (Alcock, 1892)
Hydractinia moniliformis Huang, Zhong & Zhang, 2010 accepted as Podocoryna moniliformis (Huang, Zhong & Zhang, 2010)
Hydractinia monocarpa Allman, 1876
Hydractinia monoon (Hirohito, 1988)
Hydractinia multispina Fraser, 1938
Hydractinia multitentaculata (Millard, 1975)
Hydractinia munita (Calder, 2010)
Hydractinia nagaoensis Bouillon, Medel & Peña Cantero, 1997
Hydractinia novaezelandiae Schuchert, 1996
Hydractinia ocellata (Agassiz & Mayer, 1902) accepted as Podocoryna ocellata (Agassiz & Mayer, 1902)
Hydractinia otagoensis (Schuchert, 1996)
Hydractinia pacifica Hartlaub, 1905
Hydractinia parvispina Hartlaub, 1905
Hydractinia paucispinata Vervoort, 2006
Hydractinia phialiformis (Antsulevich, 1983)
Hydractinia phyllosoma Huang & Xu, 2015 (unaccepted > unavailable name )
Hydractinia piscicola (Komai, 1932)
Hydractinia polycarpa Fraser, 1938
Hydractinia polyclina L. Agassiz, 1860
Hydractinia polytentaculata Xu & Huang, 2006 accepted as Podocoryna polytentaculata (Xu & Huang, 2006)
Hydractinia proboscidea (Hincks, 1868)
Hydractinia prolifica Fraser, 1948 accepted as Hydractinia rugosa Fraser, 1938
Hydractinia promiscua Galea & Ferry, 2015
Hydractinia quadrigemina Fraser, 1938
Hydractinia recurvatus Lin, Xu, Huang & Wang, 2010 accepted as Podocoryna recurvata (Lin, Xu, Huang & Wang, 2010)
Hydractinia reticulata (Fraser, 1938) accepted as Podocoryna reticulata (Fraser, 1938)
Hydractinia rugosa Fraser, 1938
Hydractinia sandrae (Wedler & Larson, 1986)
Hydractinia sarsii (Steenstrup, 1850)
Hydractinia spinipapillaris (Hirohito, 1988)
Hydractinia spiralis Goto, 1910
Hydractinia symbiolongicarpus Buss & Yund, 1989
Hydractinia symbiopollicaris Buss & Yund, 1989
Hydractinia taiwanensis Xu, Huang, Lin, Guo & Wang, 2014 accepted as Podocoryna taiwanensis (Xu, Huang, Lin, Guo & Wang, 2014)
Hydractinia thatcheri Chapman, 1931 †
Hydractinia uniformis Stampar, Tronolone & Morandini, 2006 accepted as Podocoryna uniformis (Stampar, Tronolone & Morandini, 2006)
Hydractinia valens Fraser, 1941
Hydractinia vallini Jäderholm, 1926
Hydractinia verdi Ritchie, 1907
Hydractinia yerii (Iwasa, 1934)
Hydrissa sodalis (Stimpson, 1858)
Hydrocorella africana Stechow, 1921
Hydrocorella calcarea (Carter, 1977) (uncertain > taxon inquirendum )
Hydrocorella dibleyi (Gregory, 1931) †
Hydrocorella spinifera (Stechow, 1962)
Janaria mirabilis Stechow, 1921