Marine regions
Oceans cover about 70% of the Earth's surface. Life on Earth originated in the seas, and the oceans continue to be home to an incredibly diverse web of life. The oceans of Earth serve many functions.
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Coral reefs are the most diverse of all marine ecosystems. Corals are found across the world’s ocean, in both shallow and deep water.
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An estuary is the place were the rivers ans streams meet with the ocean. When the freshwater and salt water mix they provide high levels of nutrients in the water and also in the sediment that mix with one another.
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