Bongripper are an experimental sludge/doom metal band from Chicago, Illinois. The band formed in 2005 after a simple jam session turned into something much more serious. Their first album, The Great Barrier Reefer, consists of only one track that is nearly 80 minutes long; the album was a very limited release, though it was finally rereleased in October 2012 due to popular demand. Their sound is very experimental, tapping into elements of a vast range of genres, including noise, drone doom, and ambient music.