Tidal currents are the horizontal movement of water caused by the rise and fall of tides. As the moon and sun exert gravitational forces on the Earth, they create changes in water levels, leading to the flow of water in and out of coastal areas. These currents can vary in speed and direction depending on the location and the phase of the tide. These currents are important for marine ecosystems, as they help distribute nutrients and support various forms of marine life. Additionally, tidal currents can be harnessed for energy through tidal energy technologies, providing a renewable source of power.