Jellyfish,a beautiful sea life,which looks like a transparent umbrella.Though jellyfish has a nice moderate appearance,its really very fierce. In fact,Its tentacles are its disgestion organ,also,the tentacles are its weapon,which are all covered a special cells that can make its prey die.So,in summer,when we play in the seaside,maybe someone feels his/her chest or arms and legs ache and lull,there must be jellyfish attack people. At this time, we should deal with this matter carefully ,otherwise,it even can make people die.

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