Could someone fix error my text?

On the same day, they reached the coast of Portugal, Dr. Aronnax and Ned were already preparing to flee the Submarine, but before that, Aronnax went in search of the Captain who showed him the treasure captured by his men to distribute to the poor. The next day, the submarine moved away from Europe, preventing them from fleeing. Already on the high seas, the captain takes Aronnax to see the lost city of Atlantis at the bottom of the Atlantic Ocean. On the day, they spotted some artistic whales that Ned Land wanted to hunt, but Nemo denied it, because he should kill the killer whales, with that, the captain hunted them using the Nautilus, killing them all. Later, the Nautilus went south again and by the time it reached the South Pole, Nemo called it "my continent."