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| | Sea Urchin- Enchanted Learning Software |
 | | The sea urchin is a spiny, hard-shelled animal that lives on the rocky seafloor, from shallow waters to great depths. |
 | | The biggest sea urchin is the red sea urchin (Strongylocentratus franciscanus); it has a test about 7 inches (18 cm) in diameter. |
 | | Predators of Sea Urchins: Sea urchins are eaten by crabs, sunflower stars, snails, sea otters, some birds, fish (including wolf eels), and people. |
| www.enchantedlearning.com /subjects/invertebrates/echinoderm/Seaurchin.shtml (367 words) |
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