What's the largest ocean that ever existed on Earth?

Panthalassa, a single world ocean surrounding the supercontinent Pangaea, would have stretched at least 1,800 miles (3,000 kilometers) wider than the Pacific.

What's the largest ocean that ever existed on Earth?
Panthalassa, a single world ocean surrounding the supercontinent Pangaea, would have stretched at least 1,800 miles (3,000 kilometers) wider than the Pacific.