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"Benthic" refers to the '''bottom''' of a body of water (bethos means life living at the bottom or greatest depth of an ocean, lake, river, etc). "Pelagic" refers to the '''top''' or upper layers of a body of water. For example, phytoplankton are located in the pelagic zone since they need sunlight to perform photosynthesis and produce nutrients.

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13y ago

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