As you go deeper into the ocean, the pressure of the water pushes down to you even though water feels light but it depends on the amount of water is in making it feel heavy on you.
Answer: The surface water is usually saturated with oxygen, absorbed from the atmosphere and from photosynthesis of algae. In the deep water the oxygen is consumed when breaking down the organic matter that sinks from the surface. ... In areas with poor water turnover the oxygen in the deep water can become completely used up.
