As we see, there is nothing a priori impossible in the existence of a giant sea serpent. There is nothing unusual in its size or habits. He simply evades examination by scientists for centuries! Here is his story, the story of one of the most mysterious, exciting creatures on the planet. Maybe this is the most fantastic thing that nature has prepared for us. I do not pretend to cover the topic completely, but I can proudly say that I spent about 12 years collecting information, conducting searches in the largest libraries in the world. As for those who continue to deny the existence of giant creatures of an unknown species in the depths of the sea, then I address them to my previous book about the kraken, which during this time has already moved from objects of cryptozoology to specific characters in textbooks. I think that the same honor awaits the Great Sea Serpent!