the shallow part of the ocean at the edge of the continents
the edge of the continental shelf that extends steeply downward tot he ocean floor
the floor of the deep ocean
the highest part of a chain of underwater mountains
a deep, narrow valley in the ocean floor
a river like flow of water in the ocean
the rise and fall of the surface level of the ocean
the up and down movement of ocean water caused by the wind
the sunlit water of the ocean
the ocean water where sunlight does not reach
a platform or ridge of coral at or near the ocean surface
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