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An order of the class Anthozoa, commonly known as the sea anemones. Actiniaria contains approximately 1100 species. They are strictly marine,...


= Encyclopedia Article; = Research Update
Figure 1.Diagrammatic drawing of a sea anemone with pedal disk, smooth column, and many tentacles. (Adapted from L. H. Hyman, The Invertebrates: Protozoa through Ctenophora, vol. 1, McGraw-Hill, New York, 1940)
From Encyclopedia article 'Actiniaria'
Figure 2.Diagrammatic cross-section of a sea anemone. Note the ovoid central actinopharynx, paired mesenteries (some of them extending the entire distance from the column wall to the actinopharynx, some not), retractor muscles, and mesenterial filaments. (Adapted from L. H. Hyman, The Invertebrates: Protozoa through Ctenophora, vol. 1, McGraw-Hill, New York, 1940)
From Encyclopedia article 'Actiniaria'
Figure 3.Larval stages of Anthopleura species. (a) Ciliated planula larva. (b) Juvenile that matured inside the parent, just after its release.
From Encyclopedia article 'Actiniaria'
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