What is the name of the current that goes in a big circle?

The current that goes in a big circle is known as a gyre. Gyres are large systems of circulating ocean currents, typically driven by wind patterns and the Earth's rotation. In the North Atlantic, for example, the North Atlantic Gyre circulates clockwise, while in the South Pacific, the South Pacific Gyre moves counterclockwise. These currents play a significant role in regulating climate and marine ecosystems.