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Questions and Answers
Which class do sea urchins belong to?
Which class do sea urchins belong to?
- Ophiuroidea
- Echinodermata
- Echinoidea (correct)
- Asteroidea
What is the primary diet of sea urchins?
What is the primary diet of sea urchins?
- Crabs
- Fish
- Algae (correct)
- Marine mammals
How many species of sea urchin are there?
How many species of sea urchin are there?
- 950 (correct)
- 1,000
- 1,500
- 500
How deep can sea urchins be found in the ocean?
How deep can sea urchins be found in the ocean?
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What is the symmetry of adult sea urchins?
What is the symmetry of adult sea urchins?
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Study Notes
Sea Urchin Classification
- Sea urchins belong to the class Echinoidea.
Sea Urchin Diet
- Sea urchins are primarily herbivores, with algae being their main food source.
Species of Sea Urchins
- There are approximately 950 species of sea urchins.
Habitat and Depth
- Sea urchins can be found in oceans worldwide, from shallow tide pools to depths of up to 6,500 meters (21,325 feet).
Body Symmetry
- Adult sea urchins exhibit pentagonal (five-part) radial symmetry.
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