How To Use Actinia In A Sentence
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In the midst of this inextricable mass of plants and sea weed, I noticed some charming pink halcyons and actiniae, with their long tentacles trailing after them, and medusae, green, red, and blue.
Twenty-Thousand Leagues Under the Sea
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Cold-water coral mound dominated by Lophelia pertusa and colonised by orange actinians and a white anthipathrian.
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Bilaterality.-All anthozoan groups, including both the Rugosa and the Scleractinia, are distinguished by an essentially bilateral organization.
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The life cycles of the hydrozoans P. carnea (B) and Hydractinia echinata (C) and a representative anthozoan (D).
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Further, the second experiment to be adduced against the specificity of anaphylaxis I conducted with two kinds of toxalbumin, extracted from the Actinia, a substance which I named congestin, as its property is to bring on grave congestion of the circulatory system in the intestines and stomach.
Charles Richet - Nobel Lecture
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In Hydractinia, these features involve changes in the regulation of axial patterning along stolons and polyps.
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Since the beginning of the Cenozoic, reefs have become dominated by scleractinian corals and calcareous algae.
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Evolutionary developmental innovations important for colonial integration have evolved independently in many colonial hydrozoans, and are displayed both in Hydractinia and in more advanced forms of siphonophores.
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The larger, more conspicuous include other species of cold-water coral, actinians and sponges.
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It was thickly covered with a mass of corals, actiniae, and other productions of the ocean, of vast dimensions, of every possible form, and of the most brilliant colours.
In the Eastern Seas
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Although the two species were not found in sympatry, a population of P. elegans was found only 9 km away from a P. actinia population in Santo Antonio da Patrulha county.
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Great sea slugs crawled about on the bottom with gigantic starfish, and actiniae of vivid colours spread their tentacled blossoms.
Fire Island Being the Adventures of Uncertain Naturalists in an Unknown Track
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Even on reefs, most species of host actinians are inconspicuous, unlike their partner fish.
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In any case, most if not all Triassic scleractinians, whether zooxanthellate or not, show skeletal construction different from modern (strictly post-Cretaceous) equivalents.
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In studying the actiniae I have made a striking discovery, and I should be glad if you would communicate it to the Academy in advance of the illustrated paper on the same subject, which I hope soon to send you.
Louis Agassiz His Life and Correspondence
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Each either have these are the aragonitic needles that both make up and protect the scleractinia
CreationWiki - Recent changes [en]
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However, actinians, like all coelenterates, capture and digest animal prey with their nematocysts.
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It is made of bundles of aragonitic needles that protect the scleractinia.
CreationWiki - Recent changes [en]
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The Corallimorpharia have a flattened adherent base, similar to Scleractinia, but without a base plate or basilar muscles.
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Chaetodon capistratus is a browser who feeds on anthozoans preferring hexacoral such as scleractinians, anemones, and zoantharians.
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Acaleph, coral, actinia , electric eel, seaweed, shark, whale, seal...
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It has been seen that varying temperatures have a dramatic effect on the growth rates of some actinians.
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When the limits of the substrate have been reached, a Hydractinia colony will bud reproductive polyps called gonozooids from the stolonal mat.
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If skeletogenesis in Scleractinia is proved to be "reversible," we should reconstruct anthozoan taxonomy itself as a beginning, without distinguishing corals from soft-bodied anemones.