In people's minds, dolphins have always been a mysterious animal. However, what people are most interested in dolphins is probably their bravery and risk-taking behavior to save others. In 1949, the wife of a lawyer in Florida, USA, disclosed in the magazine "Natural History" her strange energy when she was rescued from drowning at sea. While she was swimming at a beach, she suddenly fell into an underwater undercurrent. Rows of turbulent waves hit her. At the moment she was about to fall into coma, a dolphin swam over quickly and used its pointed body to save her. He gave her a sharp push, then several more, until she was pushed down into the shallow water. After the woman regained consciousness, she looked around to see who had saved her. However, there was no one on the beach except for a dolphin playing in the water not far from the shore. Dolphins will not only push those who go against the current to the shore, but they will also act bravely and come to the rescue when they encounter sharks eating people. In the summer of 1959, the passenger ship "Leo Atero" crashed due to an explosion in the Caribbean Sea. Many passengers were struggling in the turbulent waters. Unexpectedly, misfortunes never come singly, a large group of sharks gathered around, and everyone was about to die. At this critical moment of fishing, swarms of dolphins suddenly appeared like "celestial soldiers and generals" and pounced on the greedy sharks, driving away the demons in the sea and saving the passengers in distress.