The world's oceans contain an estimated 171,000 pieces of plastic per square mile of surface water.
Fact #10938
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Plankton form the base of many marine food chains.
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Some deep-sea creatures produce their own light through bioluminescence.
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Certain fish can inflate their bodies to appear larger.
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Ancient oceans once covered much of Earth's surface.
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Certain fish live in symbiotic relationships with other species.
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The Mariana Trench is so deep that Mount Everest could be placed inside it and still be covered by over a mile of water.
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The ocean contains structures larger than mountain ranges.
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Some deep-sea fish like the viperfish have teeth so large they cannot close their mouths.
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