What is the entire volume of water in the oceans and the marine organisms that live above the ocean floor?

The total volume of water in the Earth's oceans is approximately 1.332 billion cubic kilometers (about 320 million cubic miles). This vast expanse of water supports a diverse range of marine organisms, including fish, mammals, invertebrates, and phytoplankton, which live in various habitats from the surface to the ocean floor. While specific estimates of the total biomass of marine organisms can vary, it is generally believed to be around 2 billion metric tons. Together, the ocean's volume and its vibrant ecosystems play a crucial role in global climate regulation and biodiversity.