CMX, originally Cloaca Maxima, is a Finnish rock band. They originally played hardcore punk, but soon expanded to play a wide variety of rock formats, including progressive rock, heavy metal, and mainstream rock 'n' roll. Throughout their career, they have been influenced by progressive rock bands such as Rush, Yes, Tool and King Crimson. The progressive influence is most evident on their albums Dinosaurus Stereophonicus (2000) and Talvikuningas (2007).