Acontiactis gokhaleae England, 1990 (basis of record)
Acontiophorum mortenseni Carlgren, 1938 (basis of record)
Acontiophorum niveum Fautin, Eppard & Mead, 1988 (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)
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 alba Risso, 1827 (basis of record)
Actinia aster Ellis, 1768 (basis of record)
Actinia australiensis Carlgren, 1950 (basis of record)
Actinia bermudensis (McMurrich, 1889) (basis of record)
Actinia bicornis Müller, 1776 (basis of record)
Actinia candida Müller, 1776 accepted as Metridium senile (Linnaeus, 1761) (additional source)
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 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 gracilis Hemprich & Ehrenberg in Ehrenberg, 1834 (basis of record)
Actinia grobbeni Watzl, 1922 (basis of record)
Actinia iris Müller, 1789 (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 mertensii Brandt, 1835 (basis of record)
Actinia minutissima Le Sueur, 1817 (basis of record)
Actinia obtruncata Stimpson, 1853 (additional source)
Actinia papuana Quoy & Gaimard, 1833 (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 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 volva Müller, 1776 (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)
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 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)
Actinostola kerguelensis Carlgren, 1928 (basis of record)
Actinothoe alderi (Cocks, 1851) (basis of record)
Actinothoe anguicoma (Price in Johnston, 1847) (basis of record)
Actinothoe bellii (Cocks, 1851) (basis of record)
Actinothoe bradleyi (Verrill, 1869) (basis of record)
Actinothoe carlgreni (Haddon & Duerden, 1896) (basis of record)
Actinothoe glandulosa Carlgren, 1954 (basis of record)
Actinothoe gracillima (McMurrich, 1887) (basis of record)
Actinothoe gravieri (Pax, 1912) (basis of record)
Actinothoe ignea (Fischer, 1874) (basis of record)
Actinothoe kerguelensis (Pax, 1922) (basis of record)
Actinothoe lobata (Carlgren, 1899) (basis of record)
Actinothoe milmani (Haddon & Shackleton, 1893) (basis of record)
Actinothoe modesta (Verrill, 1866) (additional source)
Actinothoe paradoxa (McMurrich, 1893) (basis of record)
Actinothoe patagonica (Carlgren, 1899) (basis of record)
Actinothoe plebeia (Haddon, 1898) (basis of record)
Actinothoe pustulata (McMurrich, 1887) (basis of record)
Actinothoe qingdaoensis Pei, 1993 (basis of record)
Adamsia fusca Milne Edwards, 1857 (basis of record)
Adamsia sociabilis Verrill, 1882 accepted as Calliactis sociabilis (Verrill, 1882) (additional source)
Aiptasia insignis Carlgren, 1941 (basis of record)
Aiptasiogeton eruptaurantia (Field, 1949) (basis of record)
Aiptasiogeton hyalinus (Delle Chiaje, 1822) (basis of record)
Aiptasiomorpha elongata Carlgren, 1951 (basis of record)
Aiptasiomorpha minima (Stephenson, 1918) (basis of record)
Aiptasiomorpha paxi Stephenson, 1920 (basis of record)
Aiptasiomorpha texaensis Carlgren & Hedgepeth, 1952 (basis of record)
Alicia beebei Carlgren, 1940 (additional source)
Alicia pretiosa (Dana, 1846) (basis of record)
Alicia rhadina Haddon & Shackleton, 1893 (basis of record)
Alicia sansibarensis Carlgren, 1900 (basis of record)
Amphianthus armatus Carlgren, 1928 (basis of record)