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  1. Hydroïdpoliepen - Wikipedia

  2. Hydroid | Characteristics & Life Cycle | Britannica

    WEBhydroid, any member of the invertebrate class Hydrozoa (phylum Cnidaria). Most hydroids inhabit marine environments, but some have invaded …

  3. ADW: Hydrozoa: INFORMATION

    WEBThe Hy­dro­zoa is a sub­group of cnidar­i­ans con­taing­ing ap­prox­i­mately 3700 species. It is a di­verse group with a va­ri­ety of life cy­cles, growth forms, and spe­cial­ized struc­tures. Like many cnidar­i­ans, hy­dro­zoans have both …

  4. Hydrozoa Information | Aquatic Invertebrates | Earth Life

  5. People also ask
    Although marine species vastly outnumber freshwater ones, the genus Hydra may nevertheless be the best known hydrozoan. It appears in almost all textbooks on invertebrate zoology, but this simple animal is not at all representative of the Hydrozoa as a whole, and may actually give a false impression of the complexity of this animal group.
    Most hydrozoans are marine, and hydrozoan species are found in nearly every marine habitat type; a very few species live in freshwater. Most hydrozoans form colonies of asexual polyps and free-swimming sexual medusae. Colonies are usually benthic, but some, notably the siphonophores, are pelagic floaters.
    animaldiversity.org
    See also MILLEPORINA; and STYLASTERINA. Hydrozoa (hydroids; phylum Cnidaria) A class of multicellular, mainly marine animals in which the cells are derived from two layers, epidermis and gastrodermis (endodermis), separated by a gelatinous mesogloea.
    Hydrozoa displays a fascinating array of biological diversity, complexity, and adaptability. From the reversal of the aging process to integrated colonial systems, hydrozoans provide unique insights into the evolutionary outcomes possible even in simple diploblastic organisms.
  6. Hydrozoa - The World Hydrozoa Database - World Register of …

  7. Hydrozoa - Animalia

  8. Hydrozoa - New World Encyclopedia

  9. Zoogeography of Hydrozoa: Past, Present and a Look to the …

  10. Hydrozoa | Encyclopedia.com