| 1. | The main tool was sonar, to bounce signals off the ocean bottom.
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| 2. | Iron Man searched the ocean bottoms for him, but couldn't find him.
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| 3. | The waste collects on the ocean bottom, damaging or eliminating bottom-dwelling life.
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| 4. | This time the problem needed to be solved on the ocean bottom.
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| 5. | Gray whale behavior involves rolling over and rubbing on the ocean bottom,
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| 6. | They may forage the surface, underwater or even on the ocean bottom.
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| 7. | However, the voyage to the ocean bottom is still a challenging experience.
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| 8. | From La Jolla Shores, the ocean bottom slopes gently out to sea.
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| 9. | Ala Moana's ocean bottom drops quickly, so novice swimmers should use caution.
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| 10. | Thus, only the finest-grained sediments, principally a micaceous mud, reached the ocean bottom.
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