Tourists and locals in Central Visayas are warned to be cautious when swimming in jellyfish-infested waters as stings could, in fact, kill humans. Dr. Eugenia Mercedes Cañal of the Regional Epidemiology Surveillance Unit (Resu) of the Department of Health 7 said jellyfish naturally sting to protect themselves from predators or any other harmful animals. "It is not the fault of nature that we intruded on their habitat because they are there. Just imagine if someone trespasses on your house, what would you do?" she told SunStar Cebu on Friday, June 30, 2023.