What four things happen the deeper you go into the ocean?

As you dive deeper into the ocean, water pressure increases significantly, which can exceed thousands of pounds per square inch. The temperature generally decreases, often leading to cold, dark environments where sunlight cannot penetrate. Additionally, the availability of oxygen diminishes, affecting the types of marine life that can survive at great depths. Finally, the biodiversity often increases, with unique and specialized organisms adapted to extreme conditions found in the deep sea.