The toxic dose of venom that is dangerous. Jellyfish usually used needle toxic to predators. The victim was unconscious before eating. When we accidentally hit of venom will cause us pain, burning away and itching, rash, swelling, burning some cause neck, chest suffocation, restlessness, insomnia, fatigue, fever and jellyfish certain dangers. Lethal This light wounds caused by jellyfish. Often burns and chronic wounds may have a scar.