Final answer:
In the story "The Colomber" by Dino Buzzati, Stefano sees a mysterious creature known as the Colomber.
Step-by-step explanation:
In the story "The Colomber" by Dino Buzzati, Stefano sees a mysterious creature in the water. This creature is known as the Colomber. It is a large sea creature that is said to bring bad luck to anyone who sees it. Stefano becomes obsessed with trying to capture the Colomber and prove his bravery.