In a dive, Captain Nemo found that a pearl diver was about to die in the shark's mouth, but he completely ignored his own life and death and rushed to fight with the shark. Hand-to-hand combat, once he loses, even he will become a shark's dish, but he despairs of a complete stranger. Whenever Mr Pierre Aronnax feels that an accident is irreversible, he always takes it lightly. Even if he fell into the ice cave, he didn't despair. Even if it was a little thrilling, he was calm and took everyone out of danger.

On the day when the ship sailed for the Greek Islands, Captain Nemo joined a diver and gave him a box full of gold bars in front of the professor, worth nearly five million francs. The captain didn't explain this unusual move, which made the professor have infinite doubts. Captain Nemo's arrival interrupted the professor, and then he saw the crew salvaging countless gold and silver jewels from a sunken ship.