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  2. Coelenterata - Wikipedia

    en.wikipedia.org/wiki/Coelenterata

    Coelenterata is a term encompassing the animal phyla Cnidaria (corals, true jellies, sea anemones, sea pens, and their relatives) and Ctenophora (comb jellies). The name comes from Ancient Greek κοῖλος (koîlos) 'hollow' and ἔντερον (énteron) 'intestine', referring to the hollow body cavity common to these two phyla.

  3. Cnidaria - Wikipedia

    en.wikipedia.org/wiki/Cnidaria

    Pacific sea nettles, Chrysaora fuscescens. Cnidaria (/ n ɪ ˈ d ɛər i ə, n aɪ-/ nih-DAIR-ee-ə, NY-) [4] is a phylum under kingdom Animalia containing over 11,000 species [5] of aquatic invertebrates found both in fresh water and marine environments (predominantly the latter), including jellyfish, hydroids, sea anemones, corals and some of the smallest marine parasites.

  4. Polypodium hydriforme - Wikipedia

    en.wikipedia.org/wiki/Polypodium_hydriforme

    This supports the placement of Polypodium within Cnidaria. [2] This accords with its traditional classification, in particular with the fact that Polypodium possesses nematocysts and a cnidarian-like body plan. [2] Myxozoans are currently classified as cnidarians as well. [4]

  5. Alcyonacea - Wikipedia

    en.wikipedia.org/wiki/Alcyonacea

    Alcyonacea are an order of sessile colonial cnidarians that are found throughout the oceans of the world, especially in the deep sea, polar waters, tropics and subtropics. Whilst not in a strict taxonomic sense, Alcyonacea are commonly known as soft corals.

  6. Obelia - Wikipedia

    en.wikipedia.org/wiki/Obelia

    Obelia is a genus of hydrozoans, a class of mainly marine and some freshwater animal species that have both polyp and medusa stages in their life cycle. Hydrozoa belongs to the phylum Cnidaria, which are aquatic (mainly marine) organisms that are relatively simple in structure with a diameter around 1mm. [1]

  7. Aurelia (cnidarian) - Wikipedia

    en.wikipedia.org/wiki/Aurelia_(cnidarian)

    The similar appearances of moon jellyfish is what has made them so hard to identify. They tend to have a variety of different sizes, however, they typically range 5–38 cm (2.0–15.0 in) in diameter with an average of 18 cm (7.1 in) wide and 8 cm (3.1 in) in height. [12]

  8. Sea pen - Wikipedia

    en.wikipedia.org/wiki/Sea_pen

    The entire colony is fortified by calcium carbonate in the form of spicules and a central axial rod. Using their root-like peduncles to anchor themselves in sandy or muddy substrate, the exposed portion of sea pens may rise up to 2 metres (6.6 ft) in some species, such as the tall sea pen ( Funiculina quadrangularis ).

  9. Myxosporea - Wikipedia

    en.wikipedia.org/wiki/Myxosporea

    Myxosporea is a class of microscopic animals, all of whom are parasites.They belong to the Myxozoa clade within Cnidaria.They have a complex life cycle that comprises vegetative forms in two hosts—one an aquatic invertebrate (generally an annelid but sometimes a bryozoan) and the other an ectothermic vertebrate, usually a fish.