Acontiactis gokhaleae England, 1990 (basis of record)
Acontiophorum bombayensis Parulekar, 1968 accepted as Acontiophorum bombayense Parulekar, 1968 (basis of record)
Acontiophorum mortenseni Carlgren, 1938 (basis of record)
Acontiophorum niveum Fautin, Eppard & Mead, 1988 (basis of record)
Acraspedanthus elongatus Carlgren, 1924 accepted as Isoparactis ferax (Stuckey, 1909) (additional source)
Acraspedanthus ferax (Stuckey, 1909) accepted as Isoparactis ferax (Stuckey, 1909) (basis of record)
Acrozoanthus australiae Saville-Kent, 1893 (basis of record)
Actinauge bocki Carlgren, 1943 (basis of record)
Actinauge chilensis Carlgren, 1959 (basis of record)
Actinauge cristata Riemann-Zürneck, 1986 (additional source)
Actinauge granulata Carlgren, 1928 (basis of record)
Actinauge longicornis (Verrill, 1882) (additional source)
Actinauge verrilli McMurrich, 1893 accepted as Actinauge verrillii McMurrich, 1893 (additional source)
Actineria dendrophora Haddon & Shackleton, 1893 (basis of record)
Actineria villosa Quoy & Gaimard in de Blainville, 1830 (basis of record)
Actinernus antarcticus (Carlgren, 1914) (additional source)
Actinernus elongatus (Hertwig, 1882) (additional source)
Actinernus nobilis Verrill, 1879 (additional source)
Actinernus robustus (Hertwig, 1882) (basis of record)
Actinia abyssicola Moseley, 1877 accepted as Stephanauge abyssicola (Moseley, 1877) (additional source)
Actinia alba Risso, 1827 (basis of record)
Actinia anachoreta Pax, 1922 accepted as Pseudactinia infecunda (McMurrich, 1893) (additional source)
Actinia aster Ellis, 1768 (basis of record)
Actinia atrimaculata Grube, 1840 (basis of record)
Actinia australiensis Carlgren, 1950 (basis of record)
Actinia bermudensis (McMurrich, 1889) (basis of record)
Actinia bicolor Le Sueur, 1817 accepted as Calliactis tricolor (Le Sueur, 1817) (basis of record)
Actinia bicornis Müller, 1776 (basis of record)
Actinia brevicirrhata Risso, 1827 accepted as Cereus pedunculatus (Pennant, 1777) (basis of record)
Actinia candida Müller, 1776 accepted as Metridium senile (Linnaeus, 1761) (additional source)
Actinia carneola Stimpson, 1853 accepted as Stomphia coccinea (Müller, 1776) (basis of record)
Actinia chlorodactyla Brandt, 1835 (basis of record)
Actinia cleopatrae Hemprich & Ehrenberg in Ehrenberg, 1834 (basis of record)
Actinia curta Drayton in Dana, 1846 (basis of record)
Actinia delicatula (Hertwig, 1888) (basis of record)
Actinia denticulosa Le Sueur, 1817 accepted as Corynactis denticulosa (Le Sueur, 1817) (basis of record)
Actinia dubia Lesson, 1830 (basis of record)
Actinia erythrospilota Brandt, 1835 (basis of record)
Actinia fiscella Müller, 1789 (basis of record)
Actinia gelatinosa Moseley, 1877 (basis of record)
Actinia gemma Drayton in Dana, 1846 (basis of record)
Actinia glandulosa Otto, 1823 accepted as Bunodactis glandulosa (Otto, 1823) (basis of record)
Actinia gracilis Hemprich & Ehrenberg in Ehrenberg, 1834 (basis of record)
Actinia grobbeni Watzl, 1922 (basis of record)
Actinia infecunda McMurrich, 1893 accepted as Pseudactinia infecunda (McMurrich, 1893) (basis of record)
Actinia iris Müller, 1789 (basis of record)
Actinia judaica (Linnaeus, 1761) (basis of record)
Actinia kraemeri Pax, 1914 (basis of record)
Actinia laurentii Brandt, 1835 (basis of record)
Actinia mamillaris Quoy & Gaimard, 1833 (basis of record)
Actinia melanaster Verrill, 1901 accepted as Anemonia melanaster (Verrill, 1901) (basis of record)
Actinia mertensii Brandt, 1835 (basis of record)
Actinia minutissima Le Sueur, 1817 (basis of record)
Actinia multicolor Stimpson, 1856 accepted as Physactis multicolor (Stimpson, 1856) (basis of record)
Actinia nigropunctata Stimpson, 1856 accepted as Sagartia nigropunctata (Stimpson, 1856) accepted as Cylista nigropunctata (Stimpson, 1856) (basis of record)
Actinia nitida Dawson, 1858 accepted as Stomphia coccinea (Müller, 1776) (additional source)
Actinia obtruncata Stimpson, 1853 (additional source)
Actinia papuana Quoy & Gaimard, 1833 (basis of record)
Actinia phaeochira (Schmarda, 1852) accepted as Anemonia sulcata (Pennant, 1777) (basis of record)
Actinia reclinata Bosc, 1802 (basis of record)
Actinia rosea Risso, 1827 (basis of record)
Actinia rosula Ehrenberg, 1834 (basis of record)
Actinia rufa Müller, 1776 accepted as Metridium senile (Linnaeus, 1761) (basis of record)
Actinia simplex Ehrenberg, 1834 (basis of record)
Actinia tenebrosa Farquhar, 1898 (basis of record)
Actinia tongana Quoy & Gaimard, 1833 (basis of record)
Actinia truncata Müller, 1776 (basis of record)
Actinia varians Müller, 1806 (basis of record)
Actinia violacea Risso, 1827 (basis of record)
Actinia virgata Johnson, 1861 accepted as Actinia cari Delle Chiaje, 1822 (basis of record)
Actinia volva Müller, 1776 (basis of record)
Actinia yarrellii Cocks, 1851 (basis of record)
Actinia zebra Grube, 1840 (basis of record)
Actiniogeton ambonensis (Kwietniewski, 1898) accepted as Anthopleura ambonensis (Kwietniewski, 1898) (basis of record)
Actiniogeton spenceri (Haddon & Duerden, 1896) accepted as Gyractis spenceri (Haddon & Duerden, 1896) (basis of record)
Actinodendron alcyonoidea Quoy & Gaimard in de Blainville, 1830 accepted as Actinodendron alcyonoideum (Quoy & Gaimard, 1833) (basis of record)
Actinodendron ambonensis (Kwietniewski, 1897) accepted as Actinodendron arboreum (Quoy & Gaimard, 1833) (basis of record)
Actinodendron arboreum (Quoy & Gaimard, 1833) (basis of record)
Actinodendron glomeratum Haddon, 1898 (basis of record)
Actinodendron hansingorum Carlgren, 1900 (basis of record)
Actinodendron plumosum Haddon, 1898 (basis of record)
Actinodiscus dawydoffi (Carlgren, 1943) accepted as Discosoma dawydoffi Carlgren, 1943 (basis of record)
Actinodiscus fungiformis (Verrill, 1869) accepted as Discosoma fungiforme (Verrill, 1869) (basis of record)
Actinodiscus nummiformis accepted as Discosoma nummiforme Rüppell & Leuckart, 1828 (additional source)
Actinodiscus rubraoris (Saville-Kent, 1893) accepted as Discosoma rubraoris Saville-Kent, 1893 (basis of record)
Actinodiscus unguja (Carlgren, 1900) accepted as Discosoma unguja Carlgren, 1900 (basis of record)
Actinoporus elegans Duchassaing, 1850 (basis of record)
Actinoporus elongatus Carlgren, 1900 (basis of record)
Actinopsis flava Danielssen & Koren, 1856 (basis of record)
Actinoscyphia plebeia (McMurrich, 1893) (additional source)
Actinoscyphia verrilli (Gravier, 1918) (basis of record)
Actinostella californica (McMurrich, 1893) (basis of record)
Actinostella conchilega (Duchassaing & Michelotti, 1860) accepted as Actinostella flosculifera (Le Sueur, 1817) (basis of record)
Actinostella flosculifera (Le Sueur, 1817) (basis of record)
Actinostephanus haeckeli Kwietniewski, 1897 (basis of record)
Actinostola carlgreni Wassilieff, 1908 (basis of record)
Actinostola chilensis McMurrich, 1904 (basis of record)
Actinostola crassicornis (Hertwig, 1882) (additional source)
Actinostola georgiana Carlgren, 1927 (basis of record)
Actinostola groenlandica Carlgren, 1899 (basis of record)