Leviathan is a concept album by progressive metal band Mastodon, released in 2004 by Relapse Records. The album is based on the Herman Melville novel Moby-Dick. Its songs "Iron Tusk", "Blood and Thunder" and "Seabeast" were released as singles. Four magazines awarded it Album of the Year in 2004: Revolver, Kerrang!, Metal Hammer, and Terrorizer.
The album brought Mastodon great critical acclaim and, thanks to the ensuing tour, a considerably larger fan base. Leviathan has sold 103,000 copies as of September, 2006.citation needed]
Guitarist Bill Kelliher considers this album to represent the water element.