The southern part of the Yellow Sea, including the entire west coast of Korea, contains a belt of intertidal mudflats, which has the total area of and is maintained by .
Oceanic megafaunas'bio-diversities, such as of marine mammals, sea turtles, and larger fish drastically decreased in modern time not only by pollution but also mainly by direct hunting, most extensively Japanese industrial whaling,[REF] illegal mass operations by Soviet with supports from Japan [REF].