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Sea urchins or urchins (/ ˈ ɜːr tʃ ɪ n z /) 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).
Learn about sea urchins, spiny marine animals with a globular body and a radial arrangement of organs. Find out how they feed, move, reproduce, and have poisonous spines and teeth.
Learn about the diverse and fascinating world of sea urchins, spiky creatures that belong to the group of marine invertebrates called echinoderms. Discover their body structure, diet, reproduction, venom and more with examples and images.
27 de may. de 2024 · Learn about sea urchins, small, spiny animals that live on the ocean floor and have no eyes. Find out their scientific name, classification, history, species, appearance, diet, predators, and more.
29 de jul. de 2020 · Learn about sea urchins, spiny invertebrates that belong to the class Echinoidea. Discover their diversity, diet, skeleton, mouthpiece and how they help balance the ocean ecosystem.
Learn about the sea urchin, a spiky ball-shaped animal that lives in various oceans and feeds on algae and other organisms. Discover its adaptations, reproduction, and how it relates to humans as food, injury, and research.
12 de nov. de 2009 · See photos of sea urchins (including fire urchins, pencil-spined urchins, and more) in this oceans life photo gallery from National Geographic.
