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Sea urchin. For other uses, see Sea Urchin (disambiguation). Sea urchins or urchins ( / ˈɜːrtʃɪnz /) 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). [1]
Urchin is an old-fashioned or humorous word for a small child, especially one who behaves badly and is dirty or untidily dressed. Learn more about the meaning, usage and pronunciation of urchin, and see examples and translations in different languages.
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.
Here's the sea urchin 101. Everything you need to know about these spiky echinoderms. Sea urchins (Echinoidea, regular urchins, porcupines of the sea). Sea u...
12 de nov. de 2009 · Explore the diverse and colorful world of sea urchins, spiny marine invertebrates that feed on algae and are part of the food chain. Learn about their ecology, evolution, and cultural significance through stunning photos and captions.
Learn about the sea urchin, a spiky ball-shaped animal that lives in various oceans and eats algae and other organisms. Find out how sea urchins reproduce, sting, and are used as food and aquarium pets.
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.
