There is hardly any oxygen available at low depths, thus making oxygen a survival challenge in the deep.
poor in oxygen and rich in carbon dioxide
Because it is.
Thermohaline circulation brings oxygen rich water to the deep ocean.
A Bathysphere, you would implode that deep with just an oxygen tank. But good luck;)
in the deep oceon floor
the ocean is deep because that is the shape of the earth and although we are not sure how deep the ocean is we do know that there is life in the deep. the ocean has made itself deep but there is really no cause that is known.
They live in the ocean-on the sea bottoms
The Pacific Ocean has the deepest point in the Challanger Deep.
Deep current is a movement of the ocean water. The ocean waters current is continuous.
yes
They live in deep trenches in the ocean.