system
Given the following post, respond as if you're commenting on Reddit:
human
Were there ever multiple oceans?

By multiple oceans I mean actually distinct oceans, i.e they are separated by land. Right now we have "5" oceans but they're actually all the same body of water.

I'd assume it would have to be something like one major ocean and then one contained within some ringlike structure of land.

Has this ever happened in earths history?
gpt
Technically the word "Ocean" means the continuous mass of salt water that flows around the world. Ancient separated salt water bodies are referred to as 'Seas'. The world's ocean is geographically divided into 'Oceans' by name, but is structurally one contiguous body of water.