Telegraph: The massive sea creatures, called Echizen kurage in Japanese, measure up to six feet (1.83 meters) in diameter and weigh more than 450 pounds (204 kilos). For the past four summers, they have mysteriously materialised in the Yellow Sea off China and the Korean peninsula before drifting across into the Sea of Japan. They are expected to be at their most populous in the coming months. “The arrival is inevitable,’ Professor Shinichi Ue, from Hiroshima University, told the Yomiuri …