First of all, i have tried finding answers on internet and too using google. But either everyone is talking about measuring sea levels and the acceptance of fifth ocean or i am not using correct keywords.
**My question is** if ocean is a single water body, then why it is divided into 5. What’s the basis of division? Does two different seas have difference in water? Because i have seen a photo some years ago about 2 Ocean meeting but not dissolving. Is that thing real?
Edit: THANKYOU ALL OF YOU FOR YOUR ANSWERS