Xenophyophores are giant single-celled organisms found on the deep ocean floor that can grow up to 8 inches across.
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Some fish can tolerate extremely salty environments.
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Dolphins have been observed surfing ocean waves purely for fun — one of the clearest signs of play in non-human animals.
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The ocean contains structures larger than mountain ranges.
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The ocean contains structures larger than mountain ranges.
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The Atlantic Ocean is widening by about 2.5 cm per year as tectonic plates spread apart.
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Phytoplankton populations have declined by about 40% since 1950, threatening the marine food chain.
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The ocean contains structures larger than mountain ranges.
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Coral reefs cover less than 1% of the ocean floor but support about 25% of all marine species.
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