system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why are different sections of the Ocean labeled as "Seas". For example, the Bearing Sea, Greenland Sea, Norwegian Sea, ect.

I understand the Mediterranean Sea and Black Seas as they are separate bodies of water.   Most of the rest just don't make sense.
gpt
Naming conventions for almost everything in nature is arbitrary, and the names of those seas in particular may be due to limited perspective. These bodies of water would have been named long before the technology needed to map them accurately would have been invented, and the names just stuck.

Take, for example, the Bering Sea in the northern Pacific. Outside of the islands that dot its southern edge, there is no clear divide between it and the Pacific that can be discerned from the coastlines. With satellite imagery we could easily find one, such as through tectonic mapping, but in the end the Bering Sea was give its name largely arbitrarily.