Sea Urchin

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Sea urchins or urchins (/ ˈɜːrtʃɪnz /) are the class echinoidea within the echinoderms Discover 15 different types of sea urchins with photos, names, habitats, and interesting facts. Approximately 950 species live on the seabed, inhabiting all oceans and depth zones from the intertidal zone which actually is not a fixed number but varies greatly, usually defined by the range between the highest and lowest tide, to deep seas of 5,000 m (16,000 ft)

Sea Urchin

[1] they typically have a globular. Learn about the diversity and characteristics of sea urchins, a group of spiny, spherical echinoderms Many beachgoers have had the misfortune to feel a sting from their spines, but how much do you know about the lives of these animals

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Sea urchins, or simply urchins, are globular echinoderms that belong to the class echinoidea

Their bodies are encased in a hard shell called the test, which contains numerous spines and pores that allow their tube feet to extend outwards. Sea urchin, any of about 950 living species of spiny marine invertebrate animals (class echinoidea, phylum echinodermata) with a globular body and a radial arrangement of organs, shown by five bands of pores running from mouth to anus over the test (internal skeleton). Discover its adaptations, reproduction, human interaction, and more with photos and interesting facts.