We Lost the Sea are an instrumental post-rock band from Sydney, Australia. The band was originally formed by friends from multiple bands that had dissolved in 2007 from the outer west Sydney suburb of Campbelltown, NSW. The current line up is composed of Mark Owen, Matt Harvey, Nathaniel D'Ugo, Mathew Kelly and Kieran Elliott. Their third album Departure Songs gained them widespread acclaim within the post-rock and metal scenes around the world.