Known commonly as the 'South Ocean or Sea, though it is also known as the 'Juice Sea' to some, situated in the South portion of the map. Its been commonly termed the Iborian Sea, due to the wide ranging activity of the Iborian Empire in this location, with many islands under its jurisdiction.
Though smaller in size than the Juice Pirates, they've been there an awful lot longer and so has in turn led to this body of water being better known as Iborian.