Korea is experiencing an unprecedented influx of toxic Nomura's jellyfish from the sea, with numbers reaching 108 per hectare, a record high since 2015. These jellyfish, known for their size and toxicity, can cause symptoms ranging from swelling and fever to muscle paralysis and shock. In response to this situation, particularly during the summer vacation season, the Ministry of Oceans and Fisheries has issued a special alert for several coastal regions, including Busan, Ulsan, Gyeongnam, and Gyeongbuk, and later extended the alert to Jeonnam and Gangwon, warning of the danger posed by these jellyfish.