Upwelling
This section of the ocean from floor to surface is called the water column.
The water that forms far below the surface is called a Deep Current.
Stream like movements of water that occur near the surface of the ocean are called surface currents. Stream like movements of ocean water far below the surface are known as a deep current.
high tides and low tides
upwelling
A seamount is a mountain rising from the ocean seafloor that does not reach to the water's surface (sea level), and thus is not an island.
is called the "ocean".
The process is called upwelling. It occurs when winds push surface water away from the coast, which allows deeper, colder water to rise and replace the displaced water. Upwelling brings nutrients from the ocean floor to the surface, supporting marine life.
Flood tide is when the ocean's water slowly rises to reach high tide.
Streamlike movements of water that occur at or near the surface are called surface currents. So logically, a deep current are streamlike movements of water that flow very slowly along the ocean floor.
Thermal Layer