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A sea urchin may be called the hedgehog of the ocean, but not all sea urchins are this spiked! Sea urchins are marine vacuum cleaners - they'll eat (suck up) just about anything they come across! Learn more sea urchin facts on this episode of Animal Fact Files!
Scientific Name: Class Echinoidea
Range: Marine waters worldwide
Habitat: Varies by species
Size: About 4 inches (10cm) in diameter
Diet: Kelp, algae, plankton, mussels, decaying bodies, and more
Threats: Sea stars, parrotfish, triggerfish, lobsters, foxes, and otters
Life span: Up to one hundred years
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