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The Surface Water of the Ocean
The surface water of the ocean is rich in tiny forms of plant and animal life. This vast floating population of microscopic organisms is called the “plankton.” Just as a man and all land animals depend ultimately for their food supply upon the grass and other green-leaved plants which, under the influence of sunlight, are able to transform the inorganic constituents of the atmosphere and the soil into organic foodstuffs—protein, fat, carbohydrates— so the tiny unicellular marine plants of plankton are able to transform the inorganic components of their environment into fat, protein and carbohydrates under the influence of sunlight. All marine life, therefore, depends directly or indirectly on these tiny organisms.
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