Which is the Biggest Ocean?

The Pacific Ocean is the biggest ocean.

The Pacific Ocean: A Giant Among Oceans

The Pacific Ocean reigns supreme as the largest and deepest of Earth's oceanic divisions. Its sheer size is astounding, covering approximately 63 million square miles—more than half of the Earth's free water. What is the largest ocean basin on Earth? - National Ocean Service This immense expanse dwarfs the other major oceans, the Atlantic and Indian Oceans, making it the undisputed champion in size. Which is the largest Ocean? The Pacific's dominance is further emphasized by its depth; it contains the Challenger Deep, the deepest known point on Earth. Hitting Bottom: Submariner Explored Deepest Part of Ocean > U.S. ...

While other sources may discuss the largest whale (the blue whale) or the largest ocean in a specific video game (e.g., Lost Island in ARK), the question clearly refers to the Earth's oceans. Therefore, the provided information focuses solely on the geographical size of the world's oceans.