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  1. Sea urchin - Wikipedia

    • Sea urchins or urchins are typically spiny, globular animals, echinoderms in the class Echinoidea. About 950 species live on the seabed, inhabiting all oceans and depth zones from the intertidal to 5,000 metres (16,000 ft; 2,700 fathoms). Their tests (hard shells) are round and spiny, typically from 3 to 10 cm (1 to 4 in) across. Sea urchins move slowly, crawling with their tu… 展开

    Diversity

    Sea urchins are members of the phylum Echinodermata, which also includes starfish, sea cucumbers, sand dollars, brittle stars, and crinoids. Like other echinoderms, they have five-fold symmetry (called pentamerism) … 展开

    Description

    Urchins typically range in size from 3 to 10 cm (1 to 4 in), but the largest species can reach up to 36 cm (14 in). They have a rigid, usually spherical body bearing moveable spines, which give the class the name Echinoide… 展开

     
  1. Every ocean

    Sea urchins are found in every ocean and in every climate, from the tropics to the polar regions, and inhabit marine benthic (sea bed) habitats, from rocky shores to hadal zone depths.
    en.wikipedia.org/wiki/Sea_urchin
    en.wikipedia.org/wiki/Sea_urchin
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  3. Sea Urchin - Description, Habitat, Image, Diet, and Interesting Facts

  4. Sea urchin | Description, Anatomy, & Facts | Britannica

    2024年10月5日 · Sea urchins live on the ocean floor, usually on hard surfaces, and use the tube feet or spines to move about. In addition, a few carnivorous species have been described. The largest urchin (known from a single …

  5. Sea Urchin - A-Z Animals

  6. Stop Sea-Urching, Here’s Everything You Need to Know About Sea …

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  8. Sea Urchin: The Marine Invertebrate - Ocean Info

    Where do sea urchins live? Sea urchins are found in the world’s oceans, including the Arctic, Atlantic, Indian, and Pacific Oceans. They are distributed across various latitudes and can be found in temperate and tropical waters.

  9. Sea Urchin - Animal Corner

    Sea Urchin Location and Habitat. Sea urchins live in oceans throughout the world and can found on the bottom of the sea bed, from the tide line to 15,000 feet deep. They reside where there is a lot of food, amongst coral, substrate …

  10. Sea urchins: Strange and spiny wonders of the ocean

    Sea urchins can be found in all of Earth’s oceans. Some species live between the high and low tide lines near the seashore. Others live in the deep ocean, mostly up to 5,000 metres below the surface. The deepest a sea urchin has ever …

  11. Sea Urchin Facts: Animals of the Oceans - WorldAtlas

    2018年3月22日 · Some species of sea urchins live in shallow or a deep rocky seabed. Sea urchins typically inhabit deep waters only if there is wave action although some species are resistant to the action. The creatures are also …

  12. Sea Urchin - U.S. National Park Service