Earths' crust is usually not exposed. Above-water portion is covered with soil, and Underwater portions are covered with various deposits or sediments. Oceans contain Pelagic sediments.(I don't know whether this underwater sediment considered as soil or not).
The soft cover is probably not being considered as Crust. Some sources telling it pedosphere (soil-sphere), but with pictures of only terrestrial soil.
But it is not clear to me : exact how-much portion is being called pedosphere? Is it the whole skin of Earth (including underwater-depositions)? If not; then
what is the correct term for the complete soft-layer on Earth?
Is there any term for part-of skin-of-Earth which is beneath water?