| 11. | When threatened, filefish may retreat into crevices in the reef.
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| 12. | One earthquake opens up a large crevice beneath Geode and Veritas.
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| 13. | It grows on ledges on steep slopes, and in crevices.
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| 14. | At the bottom of the crevice lay a glowing blue blob.
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| 15. | Water enters these crevices, freezes and expands to separate boulders.
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| 16. | They prefer to lay their eggs in caves or other crevices.
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| 17. | The eggs are deposited in crevices where they remain until hatching.
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| 18. | It is usually found in rock crevices or under plant debris.
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| 19. | The mottled petrel uses burrows and rock crevices to nest in.
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| 20. | It is nocturnal, hiding in reef crevices during the day.
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