Leviathan is the second album by American heavy metal band Mastodon, released in 2004 on Relapse Records. It is Mastodon's first concept album, loosely based on the 1851 novel Moby-Dick by Herman Melville. The songs "Iron Tusk", "Blood and Thunder", "I Am Ahab" and "Seabeast" were released as singles.
Released on custom butterfly splatter edition.