Wrong.

The bottom of the ocean is gonna be sand or dirt or rock. Possibly all of them. The water will actually be sitting above the bottom.

Real facts: The gnarliest thing about the first submersible to touch the bottom of the Marianas Trench was only down for like, 30 minutes IIRC, because it had a glass porthole and they were unsure of its stability (even though it was hella thick and had a pretty small diameter), but they wanted it to be able to observe what was down there. But when they hit the ground, it kicked up a cloud of silt and they were unable to see anything for the whole duration they were down there. Oof.

I learned about brine pools recently and I'm fascinated

And dirt

Actually, it's sand or rock. The water is on top of that.

A submersible with dead billionaires.

Wouldn't the bottom of the ocean NOT be water?

David Byrne was actually the first person to discover this during a Once in a Lifetime opportunity

Would it really be the bottom if there was just more water

So it’s just water all the way down? Then why are all these geologist types talking about some mythical “crust” and “mantle” nonsense? You should probably talk some sense into them.

I wouldn't wanna know what cuthulu monster lies dormant on those depths

Sand!