just alot of pressure but it would be pitch black down there that's why there are some fish with lights on them. !!!! watch finding nemo
It gets worse, and becomes darker because less sunlight can penetrate the deeper you go.
The pressure
the deeper you go, the colder the ocean water gets
It gets colder because the Sunlight heats the ocean and the deeper you go, the less penetrating the Sunlight is, therefore making the ocean water colder.
the animals
Because the deeper you go the more water you have on top of you, every 10 meters you go under water, you have another atmosphere on top of you, the wieg that is pressed to you is what causes the pressure
As you go deeper and deeper the layers will start to get hotter and thicker.
increase
lower
Temperature decreases with depth.
earthquakes and volcanoes
i was told that it is the weight of the water around you
It can affect it because of how deep the current the more you go out in the ocean the more it gets deeper