The Sea Raiders sea monsters include Scylla and Charybdis of Greek mythology, and the kraken of medieval times which is thought to have been a giant squid. Previous fictional encounters with giant squids are described in chapter 59 of Herman Melville's "Moby-Dick" of 1851, and in Jules Verne's "Twenty Thousand Leagues Under the Sea" of 1870. The narrator describes a recent period when a new sort of giant squid, a species named "Haploteuthis ferox", became known. (This fictitious name can be compared with the genus name "Architeuthis" of the giant squid.) As a part of the survey of the period, including early encounters
Twenty Thousand Leagues Under the Sea are quickly captured and brought inside the vessel, where they meet its enigmatic creator and commander, Captain Nemo. The rest of the story follows the adventures of the protagonists aboard the creature—the submarine, the "Nautilus—"which was built in secrecy and now roams the seas free from any land-based government. Captain Nemo's motivation is implied to be both a scientific thirst for knowledge and a desire for revenge upon (and self-imposed exile from) civilization. Nemo explains that his submarine is electrically powered and can perform advanced marine biology research; he also tells his new passengers that although he appreciates conversing with