What percentage of the ocean is undiscovered?

Player #53553731, I think a more accurate question: What percentage of the oceans bottom has not been mapped? I think this is what they mean.

Marcy, Bermuda Triangle! Not afraid and want to go!

Merry, Been there, made it safely.😁

i wonder what are some mysterious in the deep soo afraid

Tom, exactly. We’ve discovered all the oceans we just don’t know much about them.

Tom, agreed. How much of the water at 500 feet down has been explored? And what human can see in the dark?

Merry, well, I admire ur courage, but ur common sense isn't too good. Sorry.