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- Sea urchin - Wikipedia
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) and move by means of hundreds of tiny, transparent, adhesive "tube feet"
- Sea urchin | Description, Anatomy, Facts | Britannica
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 specimen) is Sperostoma giganteum of deep waters off Japan
- Sea Urchin - Types, Anatomy, Classification, Reproduction Lifecycle
Sea urchins, or simply urchins, are globular echinoderms that belong to the class Echinoidea These animals begin their life as bilaterally symmetrical larvae, but most species develop into adults with a five-fold symmetry
- Shock Discovery Reveals Sea Urchins Are Basically All Brain
Sea urchins may just look like a ball of spikes waiting to be stepped on at the tide pool, but there's much more to these barbed beasts than just roe and teeth New research reveals sea urchin nervous systems are far more complex than we knew These creatures, it turns out, possess 'all-body brains
- 15 Types of Sea Urchins: Species, Identification, and Photos
Enter the world of sea urchin and explore the diverse habitats and physical traits of these spiky creatures
- Invertebrates of Interest: Sea Urchin
Visitors can learn more about urchin species identification, biology, habitat, geographic range, fishing methods, and more in the following links For the latest information, see the Federal Fishery Disaster Relief page
- Scientists Say Sea Urchins Are Basically Brains With Spikes
A new sea urchin brain study finds their bodies act as a broad neural system filled with chemicals like dopamine and serotonin
- Sea Urchin: The Marine Invertebrate - Ocean Info
A sea urchin is a marine invertebrate characterized by its spines They are found in all oceans of the world, from shallow coral reefs to deep-sea environments
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