Arus laut, or ocean currents, are large-scale movements of seawater that flow through the world's oceans. These currents are driven by various factors, including wind, water temperature, and salinity differences. They play a crucial role in regulating the Earth's climate by distributing heat from the equator to the poles. There are two main types of ocean currents: surface currents and deep-water currents. Surface currents, like the Gulf Stream, are primarily influenced by wind and can affect weather patterns. Deep-water currents, on the other hand, are driven by differences in water density and contribute to the global thermohaline circulation, which is essential for maintaining the balance of ocean ecosystems.