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  1. Obelia - Wikipedia

  2. Obelia | hydrozoan, colonial, polyp | Britannica

  3. Obelia - Animalia

  4. A sea fir - MarLIN - The Marine Life Information Network

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    Obelia, genus of invertebrate marine animals of the class Hydrozoa (phylum Cnidaria). The genus, widely distributed in all the oceans, is represented by many species. The animal begins life as a polyp—a tentacled, stalklike form resembling a small sea anemone attached to the ocean bottom or some other solid surface.
    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.
    en.wikipedia.org
    Obelia is typically marine, colonial and sedentary, having cosmopolitan distribution. It is found up to a depth of 80 metres. It exists in two principal form—the polyp and the medusa. The polyp represents the asexual phase which is a prominent branched hydroid colony found attached to rocks, stones, shells of animals, wooden pilings etc.
    Obelia are usually found no deeper than 200 metres (660 ft) from the water's surface, growing in intertidal rock pools and at the extreme low water of spring tides. The polyp colony reproduces asexually. During this stage of life, Obelia are confined to substrate surfaces.
    en.wikipedia.org
  6. Obelia (Sea Fur): Structure, Movement and Respiration

    WEBRespiration, Circulation and Excretion in Obelia: There are no respiratory, circulatory and excretory organs. Oxygen from the surroun­ding water diffuses directly into the cells. Carbon dioxide and nitrogenous excretory …

  7. Obelia dichotoma - Wikipedia

  8. Obelia spp. | Zooplankton Guide - Scripps Institution of …

    WEBThe genus Obelia is distributed worldwide. Habitat: Nearshore coastal waters all along the coast of the western United States. Size: 2-6 mm bell diameter, as adults. Diet: Small zooplankton. Useful Facts or …

  9. Systematic notes on two new Obelia species (Cnidaria: Hydrozoa ...

  10. Marine Ecology - Wiley Online Library

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