| 11. | Daphnia ) exhibit diel vertical migration.
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| 12. | This movement pattern is known as Diel vertical migration and is also exhibited by other oceanic organisms.
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| 13. | This vertical migration behavior is believed to be a chemical reaction, rather than a visual or mechanical.
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| 14. | These vertical migrations often occur over large vertical distances, and are undertaken with the assistance of a swimbladder.
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| 15. | This is a major process in the ocean and without vertical migration it wouldn t be nearly as efficient.
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| 16. | They descend to the mesopelagic zone as they mature, but do not exhibit a diel vertical migration pattern.
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| 17. | These movements are thought to be in response to the vertical migrations of prey organisms in the deep scattering layer.
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| 18. | These vertical migrations often occur over large vertical distances, and are undertaken with the assistance of a swim bladder.
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| 19. | They usually live at altitudes of and up to nearly during the warm seasons but may make seasonal vertical migration.
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| 20. | Based on catch records, the cookiecutter shark appears to conduct a diel vertical migration of up to each way.
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