| 1. | One of the sea otters primary food sources is the sea urchin.
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| 2. | They form the main skeletal covering for sea urchins and sea stars.
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| 3. | In 1983 was the mass of mortality of the keystone sea urchin.
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| 4. | The sea urchin genome is estimated to encode about 23, 500 genes.
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| 5. | Otters maintain the ecosystem by eating sea urchins, which feed on kelp.
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| 6. | Several of these species are commensal with various species of sea urchins.
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| 7. | Sea otters are hunters of clams, sea urchins and other shelled creatures.
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| 8. | From there, she elected to complete her fertilization of sea urchin eggs.
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| 9. | Many of his pieces recall natural forms like sea urchins, mushrooms and stalactites.
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| 10. | It is found around New Zealand wherever sea urchins are present.
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