At first sight, the oceans seem quite still when we exclude tides and waves. Don’t be fooled, they are tremendously moving. Indeed, powerful and ubiquitous currents move the Oceans. These latter are produced wind friction, gravity and water density variation in different parts of the ocean. They are present on the ocean’s surface and in its depths, flowing both locally and globally. Interestingly, they are similar to winds in the atmosphere in that they possess a general circulation pattern and transfer significant amounts of heat from Earth’s equatorial areas to the poles. Moreoverthey influence one another (by heat transfer, evaporation for example). Thus it is not surprising that both ocean current and atmospheric circulation influence our climate, our local ecosystem as well as the seafood that we eat.