https://n.news.naver.com/mnews/article/016/0002666450?sid=105https://www.researchgate.net/publication/284634290_Recent_increase_of_jellyfish_populations_and_their_nuisance_to_fisheries_in_the_Inland_Sea_of_Japan https://asia.nikkei.com/business/science/jellyfish-swarms-worry-world
http://www.nicovideo.jp/watch/sm46520928
