oceans

oceans

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The ocean covers almost 75 percent of the Earth. What we call the ocean is actually five different oceans: the Pacific, Atlantic, Indian, Arctic, and Southern. The ocean is home to a huge variety of animals, from tiny plankton to gigantic blue whales. Different animals live in different zones of the ocean, which vary in the amount of light they get, water pressure, and temperature. Threats to the ocean and its creatures include pollution and overfishing.