Sand, fish, bones, crashed boats, murder weapons, and decomposed bodies.

probably some weird ass creatures like if you ever seen the movie The Cave. I think maybe some sort of creatures like those

Well, I think that there would most definitely be creatures we have never seen before.

i think there is really weird fish and possably a lot of pirate treasure and shipwrecks lol

Well only one bafa-scape got to the bottom of the
Mariana trench (deepest place in the sea, 7 miles deep).
And they found another sea in the sea surrounded by
dead muscles, and the surface of this like pool
was covered in a thick salty like soup type of water
apparently.
That is the only time they've reached the deepest part
of the ocean, hasn't been done since and is it to
extreme.
NOTE: I saw this on an old David attenborough programme
ages ago.

Also they found huge under-water volcanoes that would be taller than mount Everest
if they were put on land, they were something like 3 miles tall, and apparently spewed
out volcanic smoke, and the tunnels where surrounded with huge crabs and other things.

trev57 wrote Well the subject says it all. I think it's insane and so trip that 95% of the ocean remains unexplored.

My opinion is that there are massive animals that nobody knows about.

I agree. New species of animals, whether large or small, are found everyday. What if there are GIANT fish down there?

Zante wrote

SovietGnome wrote Any city under the sea would be crushed under the weight of the sea. In fact anything would be crushed.

Apparently there are some little shrimp things with no eyes...

Well, anything living under there wouldn't have eyes anyway. Maybe they use untrasound?

this is going to sound stupid but what about in the ocean?

No question is stupid.

When I say sea, I mean the bottom of the oceans, I should've made that clear

SpaCed- wrote I think Osama bin ladin.

I didn't know Guantanamo Bay was underwater?

ATLANTIS!!!!!

I'm jk, but maybe.
I'm almost 100% sure that there are massive animals don there that we don't know about, and maybe it's just sand.

I kinda think some E.T.s live down there, because they know its so unexplored.