Ages 9 to 12 years. Do you know that 95% of the marine life is yet to be discovered We only know about 5% of them which we could have accessed. We have not yet invented any equipment to go into the deepest part of the ocean. This book written way ahead of its time, tells the story of a scientist who has made a monster ship named Nautical, which can pierce into the deepest of the ocean floor. He had seen many things, which people do not even know of.