Nautical fiction, frequently also naval fiction, sea fiction, naval adventure fiction or maritime fiction, is a genre of literature with a setting on or near the sea, that focuses on the human relationship to the sea and sea voyages and highlights nautical culture in these environments. The settings of nautical fiction vary greatly, including merchant ships, liners, naval ships, fishing vessels, life boats, etc., along with sea ports and fishing villages. When describing nautical fiction, scholars most frequently refer to novels, novellas, and short stories, sometimes under the name of sea novels or sea stories. These works are sometimes adapted for the theatre, film and television.
The development of nautical fiction follows with the development of the English language novel and while the tradition is mainly British and North American, there are also significant works from literatures in Japan, France, Scandinavia, and other Western traditions. Though the treatment of themes and settings related to the sea and maritime culture is common throughout the history of western literature, nautical fiction, as a distinct genre, was first pioneered by James Fenimore Cooper (The Pilot, 1824) and Frederick Marryat (Frank Mildmay, 1829 and Mr Midshipman Easy 1836) at the beginning of the 19th century. There were 18th century and earlier precursors that have nautical settings, but few are as richly developed as subsequent works in this genre. The genre has evolved to include notable literary works like Herman Melville's Moby Dick (1851), Joseph Conrad's Lord Jim (1899–1900), popular fiction like C.S. Forester's Hornblower series (1937–67), and works by authors that straddle the divide between popular and literary fiction, like Patrick O'Brian's Aubrey-Maturin series (1970–2004).