Twenty Thousand Miles Under the Sea was a science fiction novel written by Verne of France, which was first published in 1885. The story was about a brave scuba diver named Nemo, who crossed the turbulent Atlantic Ocean, the Indian Ocean, and the Pacific Ocean to explore the mysterious underwater world. He experienced all kinds of dangers and challenges. He discovered a rich biological world at the bottom of the sea, communicated with and explored various marine creatures, and also discovered the secret of human existence. In the story, Nimo encountered many dangers and challenges, such as fighting sharks, being entangled by starfish, being attacked by huge waves, and so on. He also encountered many mysterious creatures such as the mysterious undersea people, mysterious jellyfish, mysterious coral reefs, and so on. In the end, Nimo discovered the secret of the underwater world and contributed to mankind. His experience at the bottom of the sea made him a legendary hero. His story was passed down and became a classic case of human exploration of the unknown world.