Hydrosphere
Our sphere provides the water on the earth
Marine and aquatic animals live in the hydrosphere
the lithosphere, which contains all of the cold, hard, solid rock of the planet's crust (surface), the hot semi-solid rock that lies underneath the crust, the hot liquid rock near the center of the planet, and the solid iron core (center) of the planet the solid bed rock keeps it from being to deep
the biosphere, which contains all of the planet's living organisms has the life in the water
the atmosphere, which contains all of the planet's air which is in water H2O