the yellow river is known in chinese as the huang he. the yangtze is the yangtze. neither one is the yellow sea, although the huang he empties into the yellow sea.the coral sea, off the NE coast of australia, is much larger than the black, red, or yellow (all of which are about the same size). and coral is a color. so it has to be acceptable.and ben, believe it or not, you are exactly right about