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sea urchin
Table of Contents
Introduction References & Edit History Related Topics
Images & Videos
Slate-pencil urchin (Heterocentrotus mammillatus)
What is a trophic cascade?
Deuterostomia invertebrates details of a tube foot of a sea urchin
Watch how a queen triggerfish defeats a sea urchin's defensive tactics
See how sea creatures have evolved different adaptations to both catch prey and avoid becoming prey
See how sea otters maintain the balance of kelp-forest ecosystems by consuming sea urchins
Quizzes
Sea otter (Enhydra lutris), also called great sea otter, rare, completely marine otter of the northern Pacific, usually found in kelp beds. Floats on back. Looks like sea otter laughing. saltwater otters
Animal Group Names
Lion (panthera leo)
Deadliest Animals Quiz
Mute swan with cygnet. (birds)
Match the Baby Animal to Its Mama Quiz
vulture. An adult bearded vulture at a raptor recovery center. The Gypaetus barbatus also known as the Lammergeier or Lammergeyer, is a bird of prey and considered an Old World vulture.
Animal Factoids
Discover
Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.
10 Famous Artworks by Leonardo da Vinci
Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd
Causes of the Great Depression
United States electoral college map showing number of electoral votes by state.
How Does the Electoral College Work?
Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.
5 Remarkably Close U.S. Presidential Elections
United States Electoral College votes by state
How Many Electoral College Votes Does Each U.S. State Have?
Click on image for enlargements of panel sections. The Ghent Altarpiece (open view) by Jan and Hubert van Eyck, 1432, polyptych with 12 panels, oil on panel; in the Cathedral of Saint-Bavon, Ghent, Belg.
The Most Stolen Work of Art
Secret Service Agent Listens To Earpiece
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sea urchin: Related Content

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Photos and Videos

Slate-pencil urchin (Heterocentrotus mammillatus)
Deuterostomia
invertebrates
details of a tube foot of a sea urchin
What is a trophic cascade?
Watch how a queen triggerfish defeats a sea urchin's defensive tactics
See how sea creatures have evolved different adaptations to both catch prey and avoid becoming prey
See how sea otters maintain the balance of kelp-forest ecosystems by consuming sea urchins
See All Videos and Images →

Related Topics and References

Topics

Related Quizzes and Features

Quiz
Lion (panthera leo)
Deadliest Animals Quiz
Mute swan with cygnet. (birds)
Match the Baby Animal to Its Mama Quiz
vulture. An adult bearded vulture at a raptor recovery center. The Gypaetus barbatus also known as the Lammergeier or Lammergeyer, is a bird of prey and considered an Old World vulture.
Animal Factoids
Sea otter (Enhydra lutris), also called great sea otter, rare, completely marine otter of the northern Pacific, usually found in kelp beds. Floats on back. Looks like sea otter laughing. saltwater otters
Animal Group Names