Sea Urchin quiz
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Which lush marine ecosystem can be completely decimated by overgrazing sea urchin populations?
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More questions about Sea Urchin
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Which five-armed animal is a close relative of sea urchins?
Answer: Starfish
Why: Starfish and sea urchins both belong to the echinoderm phylum, sharing five-part body symmetry.
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What term describes a seafloor area stripped of kelp by sea urchins?
Answer: Urchin barren
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Which sea urchin is known for having the thickest, bluntest spines?
Answer: Slate pencil urchin
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Which visual sensory organ do sea urchins completely lack despite reacting to light?
Answer: Eyes
Why: Rather than using eyes, sea urchins detect changing shadows with light-sensitive cells in their tube feet.
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Sea urchins primarily graze on algae but also eat sponges, crinoids, and other slow-moving animals. They are classified as what?
Answer: Omnivores
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Which invertebrate is the most efficient predator of the purple sea urchin?
Answer: Sunflower star
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