Movies like tsumetai nettaigyo

Cold Fish (冷たい熱帯魚, Tsumetai Nettaigyo) is a 2010 Japanese film directed by Sion Sono. Cold Fish premiered at the 67th Venice International Film Festival on September 7, 2010, and received the best screenplay award in the Fantastic Features section at Fantastic Fest 2010. The film was released as part of the Bloody Disgusting Selects line.

The film concerns quiet and unambitious owner of a tropical fish shop whose life and family are taken over by a fellow fish entrepreneur who happens to be a serial killer. The film is loosely based on the exploits of two Tokyo serial killers, Sekine Gen and Hiroko Kazama, a husband and wife duo who owned a pet shop and murdered at least four people.