| Sea Anemones | ||||||||||
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 Color plate of "Actiniae" (an old term for Actinaria) from Ernst Haeckel's Kunstformen der Natur (1904).
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| Scientific classification | ||||||||||
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The Actiniaria is the order of animals in the class Anthozoa that includes sea anemones.
- Suborder Endocoelantheae
- Family Actinernidae
- Family Halcuriidae
- Suborder Nyantheae
- Infraorder Athenaria
- Family Andresiidae
- Family Andwakiidae
- Family Edwardsiidae
- Family Galatheanthemidae
- Family Halcampidae
- Family Halcampoididae
- Family Haliactiidae
- Family Haloclavidae
- Family Ilyanthidae
- Family Limnactiniidae
- Family Octineonidae
- Infraorder Boloceroidaria
- Family Boloceroididae
- Family Nevadneidae
- Infraorder Thenaria
- Family Acontiophoridae
- Family Actiniidae
- Family Actinodendronidae
- Family Actinoscyphiidae
- Family Actinostolidae
- Family Aiptasiidae
- Family Aiptasiomorphidae
- Family Aliciidae
- Family Aurelianidae
- Family Bathyphelliidae
- Family Condylanthidae
- Family Diadumenidae
- Family Discosomidae
- Family Exocoelactiidae
- Family Haliplanellidae
- Family Hormathiidae
- Family Iosactiidae
- Family Isanthidae
- Family Isophelliidae
- Family Liponematidae
- Family Metridiidae
- Family Minyadidae
- Family Nemanthidae
- Family Paractidae
- Family Phymanthidae
- Family Sagartiidae
- Family Sagartiomorphidae
- Family Stichodactylidae
- Family Thalassianthidae
- Infraorder Athenaria
- Suborder Protantheae
- Family Gonactiniidae
- Suborder Ptychodacteae
- Family Preactiidae
- Family Ptychodactiidae
