Jellyfish envenomation is a common incident in coastal areas all over the world. While the majority of reported cases are self-limiting with few lasting complications, a few deadly species can cause life-threatening and debilitating illnesses with a prolonged recovery time. Chrysaora spp. have been known to cause a diverse spectrum of manifestations. We report the case of a 7-year-old boy with jellyfish envenomation presenting with cyanosis, seizures and hypertension not previously described in association with the Chrysaora spp.