Acanthogorgia (Blepharogorgia) schrammi (Duchassaing & Michelotti, 1864) represented as Acanthogorgia schrammi (Duchassaing & Michelotti, 1864) (basis of record)
Acanthoisis flabellum Wright & Studer, 1889 (basis of record)
Acontiactis gokhaleae England, 1990 (additional source)
Acontiophorum bombayense Parulekar, 1968 (basis of record)
Acontiophorum mortenseni Carlgren, 1938 (additional source)
Acontiophorum niveum Fautin, Eppard & Mead, 1988 (additional source)
Acropora pagoensis Hoffmeister, 1925 accepted as Acropora eurystoma (Klunzinger, 1879) (basis of record)
Acthelmis intestinalis (Fabricius, 1780) (additional source)
Actinauge abyssorum Carlgren, 1934 (additional source)
Actinauge bocki Carlgren, 1943 (additional source)
Actinauge chilensis Carlgren, 1959 (additional source)
Actinauge cristata Riemann-Zürneck, 1986 (additional source)
Actinauge granulata Carlgren, 1928 (additional source)
Actinauge longicornis (Verrill, 1882) (basis of record)
Actinauge richardi (Marion, 1906) (additional source)
Actinauge verrillii McMurrich, 1893 (basis of record)
Actinecta de Blainville, 1830 (basis of record)
Actinecta olivacea (Le Sueur, 1817) (basis of record)
Actineria dendrophora Haddon & Shackleton, 1893 (additional source)
Actineria villosa Quoy & Gaimard in de Blainville, 1830 (additional source)
Actinernidae Stephenson, 1922 (additional source)
Actinernus antarcticus (Carlgren, 1914) (basis of record)
Actinernus elongatus (Hertwig, 1882) (additional source)
Actinernus michaelsarsi Carlgren, 1918 (additional source)
Actinernus nobilis Verrill, 1879 (basis of record)
Actinernus robustus (Hertwig, 1882) (additional source)
Actinia (Acthelmis) (basis of record)
Actinia (Actinoloba) dianthus Ellis, 1768 represented as Actinia dianthus Ellis, 1768 accepted as Metridium dianthus (Ellis, 1768) (basis of record)
Actinia (Chondractinia) (basis of record)
Actinia (Diplactis) bermudensis (McMurrich, 1889) represented as Actinia bermudensis (McMurrich, 1889) (basis of record)
Actinia (Diplostephanus) (basis of record)
Actinia (Diplostephanus) nodosa Fabricius, 1780 represented as Actinia nodosa Fabricius, 1780 accepted as Hormathia nodosa (Fabricius, 1780) (basis of record)
Actinia (Diplostephanus) peruviana Lesson, 1830 represented as Actinia peruviana Lesson, 1830 accepted as Paractis peruviana (Lesson, 1830) (basis of record)
Actinia (Diplostephanus) sanctaecatherinae Lesson, 1830 represented as Actinia sanctaecatherinae Lesson, 1830 accepted as Paractis sanctaecatherinae (Lesson, 1830) (basis of record)
Actinia (Ectacmaea) (basis of record)
Actinia (Ectacmaea) candida Müller, 1776 represented as Actinia candida Müller, 1776 accepted as Metridium senile (Linnaeus, 1761) (basis of record)
Actinia (Entacmaea) (basis of record)
Actinia (Hexastephanus) Brandt, 1835 (basis of record)
Actinia (Hexastephanus) cereus Müller, 1776 represented as Actinia cereus Müller, 1776 accepted as Actinia candida Müller, 1776 accepted as Metridium senile (Linnaeus, 1761) (basis of record)
Actinia (Isacmaea) (basis of record)
Actinia (Monostephanus) (basis of record)
Actinia (Monostephanus) simplex Ehrenberg, 1834 represented as Actinia simplex Ehrenberg, 1834 (basis of record)
Actinia (Oulactis) (basis of record)
Actinia (Paractis) peruviana Lesson, 1830 represented as Actinia peruviana Lesson, 1830 accepted as Paractis peruviana (Lesson, 1830) (basis of record)
Actinia (Phyllominyas) olivacea Le Sueur, 1817 represented as Actinia olivacea Le Sueur, 1817 accepted as Actinecta olivacea (Le Sueur, 1817) (basis of record)
Actinia (Polystephanus) (basis of record)
Actinia (Priapus) equina (Linnaeus, 1758) represented as Actinia equina (Linnaeus, 1758) (basis of record)
Actinia (Rhodactinia) (basis of record)
Actinia (Taractostephanus) (basis of record)
Actinia (Taractostephanus) quadricolor Leuckart in Rüppel & Leuckart, 1828 represented as Actinia quadricolor Leuckart in Rüppel & Leuckart, 1828 accepted as Entacmaea quadricolor (Leuckart in Rüppell & Leuckart, 1828) (basis of record)
Actinia (Tetrastephanus) Brandt, 1835 (basis of record)
Actinia (Tristephanus) (basis of record)
Actinia (Tristephanus) mesembryanthemum Ellis & Solander, 1786 represented as Actinia mesembryanthemum Ellis & Solander, 1786 accepted as Actinia nigropunctata den Hartog & Ocaña, 2003 (basis of record)
Actinia (Tristephanus) quadrangularis Bruguière, 1789 represented as Actinia quadrangularis Bruguière, 1789 accepted as Tetractis quadrangularis (Bruguière, 1789) accepted as Robsonactis quadrangularis (Bruguière, 1789) (basis of record)
Actinia (Tristephanus) sanctaehelenae Lesson, 1830 represented as Actinia sanctaehelenae Lesson, 1830 accepted as Phymactis sanctaehelenae (Lesson, 1830) (basis of record)
Actinia (Urticina) accepted as Urticina Ehrenberg, 1834 (basis of record)
Actinia alba Risso, 1827 (additional source)
Actinia annulata Gay, 1854 (basis of record)
Actinia aster Ellis, 1768 (additional source)
Actinia australiensis Carlgren, 1950 (additional source)
Actinia bermudensis (McMurrich, 1889) (additional source)
Actinia bicornis Müller, 1776 (additional source)
Actinia candida Müller, 1776 accepted as Metridium senile (Linnaeus, 1761) (basis of record)
Actinia capillata Gay, 1854 (basis of record)
Actinia cari Delle Chiaje, 1822 (additional source)
Actinia cereus Müller, 1776 accepted as Actinia candida Müller, 1776 accepted as Metridium senile (Linnaeus, 1761) (basis of record)
Actinia chlorodactyla Brandt, 1835 (additional source)
Actinia cinerea Gay, 1854 (basis of record)
Actinia cleopatrae Hemprich & Ehrenberg in Ehrenberg, 1834 (additional source)
Actinia curta Drayton in Dana, 1846 (additional source)
Actinia delicatula (Hertwig, 1888) (additional source)
Actinia dianthus Ellis, 1768 accepted as Metridium dianthus (Ellis, 1768) (basis of record)
Actinia dubia Lesson, 1830 (additional source)
Actinia ebhayiensis Schama, Mitchell & Solé-Cava, 2011 (basis of record)
Actinia equina (Linnaeus, 1758) (additional source)
Actinia erythrospilota Brandt, 1835 (additional source)
Actinia fiscella Müller, 1789 (additional source)
Actinia forskalii H. & E. (basis of record)
Actinia fragacea Tugwell, 1856 (additional source)
Actinia gelatinosa Moseley, 1877 (additional source)
Actinia gemma Drayton in Dana, 1846 (additional source)
Actinia gemmacea Ellis & Solander, 1786 accepted as Aulactinia verrucosa (Pennant, 1777) accepted as Bunodactis verrucosa (Pennant, 1777) (source of synonymy)
Actinia gracilis Hemprich & Ehrenberg in Ehrenberg, 1834 (additional source)
Actinia graminea Drayton in Dana, 1846 (basis of record)
Actinia grobbeni Watzl, 1922 (additional source)
Actinia helianthus Ellis, 1768 accepted as Stichodactyla helianthus (Ellis, 1768) (basis of record)
Actinia iris Müller, 1789 (additional source)
Actinia kraemeri Pax, 1914 (additional source)
Actinia laurentii Brandt, 1835 (additional source)
Actinia mamillaris Quoy & Gaimard, 1833 (additional source)
Actinia mediterranea Schmidt, 1971 (basis of record)
Actinia mertensii Brandt, 1835 (additional source)
Actinia mesembryanthemum Ellis & Solander, 1786 accepted as Actinia nigropunctata den Hartog & Ocaña, 2003 (basis of record)
Actinia minutissima Le Sueur, 1817 (additional source)
Actinia mucilaginosa (basis of record)
Actinia nigropunctata den Hartog & Ocaña, 2003 (additional source)
Actinia nodosa Fabricius, 1780 accepted as Hormathia nodosa (Fabricius, 1780) (basis of record)
Actinia obtruncata Stimpson, 1853 (additional source)
Actinia olivacea Le Sueur, 1817 accepted as Actinecta olivacea (Le Sueur, 1817) (basis of record)
Actinia ornata Holdsworth, 1855 (basis of record)