These living creatures living in the sea are transparent. Among the living species, there are no heart, brain, true eye, flake and bone in the jellyfish which are shown among the invertebrate creatures. The absence of such organs makes these creatures even more interesting. When the structure of the seas is examined, 95% of these organisms are composed of water, 4% is saline and 1% is of protein. The greatest known feature of seashells in society is that they burn when the skin touches. Even these marine organisms are recognized by these characteristics. The event that caused the most recognition of the seas is related to the defense mechanism of the living. When the jellyfish touches something, it perceives it as a threat to itself and uses cells called "Nematocyst". The serpents drop the tannins on these cells and then these cells start to explode.