Purpose: To clarify the uses of jellyfish as well as the dangers and treatment of its stings. I.Introduction A.Definition of a jellyfish B.Contents II.Types of toxic jellyfish A.Sea nettle B.Lion\’s mane C.Sea wasp D.Portuguese man-of-war III.Symptoms of jellyfish stings A.Skin problems 1Irritation and rash 2Swollen blisters 3Red swollen markings B.Abdominal problems 1Nausea 2Vomiting 3Diarrhea C.Respiratory problems 1Breathing difficulties 2Pain in the chest 3Running nose D.Other associating problems 1Over sweating 2Pain in the muscles 3Raise in body temperature 4Slow heart rate 5Headache 6Difficulty eating properly IV.Treatment of jellyfish stings A.First aid B.What should be done before calling for emergency? V.Uses of jellyfish A.In cooking B.In aquarium exhibits VI.Conclusion A.Contents B.Jellyfish warning signs