Actinia is een geslacht van zeeanemonen uit de familie Actiniidae.

Soorten 
 Actinia aster Ellis, 1768
 Actinia australiensis Carlgren, 1950
 Actinia bermudensis (McMurrich, 1889)
 Actinia candida Müller, 1776
 Actinia cari Delle Chiaje, 1822
 Actinia cinerea Gay, 1854
 Actinia cleopatrae Hemprich & Ehrenberg, 1834
 Actinia curta Drayton in Dana, 1846
 Actinia delicatula (Hertwig, 1888)
 Actinia equina (Linnaeus, 1758) (Paardenanemoon)
 Actinia fiscella Müller, 1789
 Actinia fragacea Tugwell, 1856
 Actinia gelatinosa Moseley, 1877
 Actinia gemma Drayton in Dana, 1846
 Actinia glandulosa Otto, 1823
 Actinia gracilis Hemprich & Ehrenberg, 1834
 Actinia graminea Drayton in Dana, 1846
 Actinia grobbeni Watzl, 1922
 Actinia infecunda McMurrich, 1893
 Actinia kraemeri Pax, 1914
 Actinia mamillaris Quoy & Gaimard, 1833
 Actinia multicolor Stimpson, 1856
 Actinia nigropunctata den Hartog & Ocaña, 2003
 Actinia papuana Quoy & Gaimard, 1833
 Actinia parasitica Couch, 1842
 Actinia phaeochira (Schmarda, 1852)
 Actinia prasina Gosse, 1860
 Actinia rosula Ehrenberg, 1834
 Actinia rufa Müller, 1776
 Actinia sali Monteiro, Sole-Cava & Thorpe, 1997
 Actinia sanguineopunctata Templeton, 1841
 Actinia schmidti Monteiro, Sole-Cava & Thorpe, 1997
 Actinia simplex Ehrenberg, 1834
 Actinia striata Quoy & Gaimard, 1833 (Zebra-anemoon)
 Actinia strigata Quoy & Gaimard, 1833
 Actinia tabella Drayton in Dana, 1846
 Actinia tenebrosa Farquhar, 1898
 Actinia tongana Quoy & Gaimard, 1833
 Actinia virgata Johnson, 1861

Zeeanemonen