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  1. Sea urchin
    Sea urchinClass of marine invertebrates
    FactsHabitatDietLarvaePredatorsAdaptationsReproductionConservation
  1. Wikipedia
    https://nl.wikipedia.org/wiki/Zee-egels

    Zee-egels - Wikipedia

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    Een zee egelsteek behandelen: 10 stappen (met …
    nl.wikihow.com
    Voorkomen en behandelen van zee-egel steken - InfoNu
    mens-en-gezondheid.inf…
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  2. Images of Echinoidea

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    Echinoidea Profile: Facts About the Class Echinoidea
    samnoblemuseum.ou.edu
    Echinoids - Sam Noble Museum
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    Free Images : ocean, fauna, invertebrate, life, sea urchin, macro ...
    profaerica-ciencias.blogspot.com
    Ciências Biológicas: Filo Echinodermata
    seawater.no
    Sea Urchins - Echinoidea
    de.academic.ru
    Echinoidea
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  3. Britannica
    https://www.britannica.com/animal/sea-…

    Sea urchin | Description, Anatomy, & Facts | Britannica

    WEBApr 8, 2024 · Learn about sea urchins, spiny marine invertebrates with a globular body and a radial arrangement of organs. Find out how they …

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      Sea urchins Identification Guide | Snorkeling Report
      snorkeling-report.com
      10 Incredible Sea Urchin Facts - A-Z Animals
      a-z-animals.com
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    • Wikipedia
      https://en.wikipedia.org/wiki/Echinoderm

      Echinoderm - Wikipedia

      WEBParacrinoidea † Regnéll, 1945. †=Extinct. An echinoderm ( / ɪˈkaɪnəˌdɜːrm, ˈɛkə -/) [3] is any deuterostomal animal of the phylum Echinodermata ( / ɪˌkaɪnoʊˈdɜːrmətə / ), which includes starfish, brittle stars, sea urchins, …

    • ADW
      https://animaldiversity.org/accounts/Echi…

      ADW: Echinoidea: INFORMATION

      WEBEchinoidea. There are approximately 940 species of echinoids distributed worldwide in marine habitats from the intertidal to 5000 meters deep. Their fossil record is extensive due to their test (an internal skeleton), and …

    • WoRMS
      https://www.marinespecies.org/echinoidea

      World Echinoidea Database - World Register of Marine Species

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      What are echinoderms?
      Echinoderm, any of a variety of invertebrate marine animals belonging to the phylum Echinodermata, characterized by a hard, spiny covering or skin. Living species include sea lilies, sea urchins, sea cucumbers, starfishes, basket stars, and sea daisies. Learn more about echinoderms.

      Echinoderm | Definition, Characteristics, Species, & Facts

      britannica.com
      What is the difference between regular and irregular echinoids?
      Echinoids are commonly grouped as regular or irregular, with the greatest differences pertaining to the oral structure, shape of the organism, and location of the anus. Regular echinoids are the sea urchins; they are generally found on rocky substrates. Irregular echinoids are the sand dollars, which are generally found on sandy or soft ground.

      ADW: Echinoidea: INFORMATION

      animaldiversity.org
      What do echinoids look like?
      Echinoids, or sea urchins (oursins [French], Seeigel [German], erizos de mar [Spanish]) constitute a group of exclusively marine invertebrates inhabiting the intertidal down to the deep-sea trenches. They are characterized by a globose or flattened skeleton known as a test.

      World Echinoidea Database - World Register of Marine Species

      marinespecies.org
      What is the world Echinoidea database?
      The information contained in the World Echinoidea Database (WED) derives largely from Mortensen's monumental Monograph of the Echinoidea (1928-1951), updated by the data contained in the Index of Living and Fossil Echinoids by Kier & Lawson (1978) covering the years 1925-70 and Kroh (2010) covering the years 1971-2008.

      World Echinoidea Database - World Register of Marine Species

      marinespecies.org
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    • Britannica
      https://www.britannica.com/animal/echinoderm

      Echinoderm | Definition, Characteristics, Species, & Facts

    • British Geological Survey
      https://www.bgs.ac.uk/discovering-geolo…

      Echinoids - British Geological Survey

      WEBLearn about echinoids, marine animals with hard shells and spines, that have lived in the seas for 450 million years. Find out how fossil echinoids are used by geologists to identify marine environments and rock ages, …

    • Smithsonian Ocean
      https://ocean.si.edu/ocean-life/invertebrates/echinoderms

      Echinoderms | Smithsonian Ocean

    • Wikipedia
      https://en.wikipedia.org/wiki/Echinoida

      Echinoida - Wikipedia