Saltwater (marine)

Saltwater, or marine water, is water found in oceans and seas, comprising about 97% of the Earth's water supply. It is characterized by its high salt content, primarily sodium chloride, which typically averages around 3.5%. This high salinity influences marine ecosystems, affecting the types of organisms that can thrive there, from tiny plankton to large whales. Saltwater also plays a crucial role in global climate regulation, weather patterns, and the water cycle. The study of saltwater environments is essential for understanding biodiversity, marine resources, and the impacts of climate change on oceanic ecosystems.