The word sea can, aside from referring to the World Ocean, also mean a specific, much smaller body of water, such as the North Sea or the Red Sea. There is no sharp distinction between a sea in this sense and an ocean, though seas are generally smaller, and are often partly (as marginal seas) or wholly (as inland seas) bordered by land.[1] However, the Sargasso Sea has no coastline and lies within a circular current, the North Atlantic Gyre. It is a distinctive body of water with brown Sargassum seaweed and calm blue water, very different from the rest of the Atlantic Ocean.[2][3] Seas are generally larger than lakes, and contain salt water rather than freshwater, but some geographic entities known as "seas" are enclosed inland bodies of water that are not salty: for instance, the Sea of Galilee is a freshwater lake.[3][lower-alpha 1] The Law of the Sea states that all of the ocean is "sea".[7][8][9][lower-alpha 2]