A sea monster attacks a ship in an illustration for 20,000 Leagues Under the Sea by Jules Verne. The illustration is by publisher and artist Pierre-Jules Hetzel, who is most famous for his drawings in Verne's books.

This terrifying monster looks a lot like an octopus or squid, which do little harm to people. Read about how author Ray Bradbury encouraged people to sympathize with sea beasts in one of his short stories.