Pacific Ocean: covering more than 63 million square miles and containing around 50% of Earth's ocean water.

Atlantic Ocean:The second-largest ocean, covering approximately 41 million square miles.

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Indian Ocean:The third-largest ocean, spanning 27 million square miles.

Southern (Antarctic) Ocean:Surrounding Antarctica, it spans about 7 million square miles.

Arctic Ocean:The smallest and shallowest of the world's oceans, covering roughly 5.4 million square miles.