The dataset contains the names of all oceans and seas in the "Limits of Oceans and Seas" (IHO, 1953). An automatic algorithm gives an area centroid for each polygon (ocean or sea). The dataset consists of four columns. The first column contains the name of the ocean or sea, column 2 and 3 contain the position of each polygon point (latitude, longitude). Column 4 contains an area index. With this index a link to the polygons is possible.