Black Lagoon (Japanese: ブラック・ラグーン Hepburn: Burakku Ragūn) is a Japanese manga series written and illustrated by Rei Hiroe. It has been published in Shogakukan's Monthly Sunday Gene-X since 2002, and ten collected volumes have been released so far. It was later adapted into an anime television series by Madhouse, that aired from April to June 2006 for twelve episodes. A second season, subtitled "The Second Barrage", ran for twelve weeks starting on October 2, 2006. A five volume original video animation series, titled Roberta's Blood Trail, was released from July 2010 to June 2011.
Viz Media began releasing an English translation of the manga in North America on August 12, 2008. Madman Entertainment licensed the anime in Australasia and the United Kingdom. The anime was dubbed and originally licensed in English by Geneon Entertainment in North America; it is now licensed by Funimation. Funimation later licensed the OVA, which also was licensed by Kazé in the UK, for release in spring 2013.