Collective Invention (Korean: 돌연변이) is a South Korean black comedy film written and directed by Kwon Oh-kwang.

[2][3][4] It is about a hapless fish-man's meteoric rise to celebrity and subsequent fall from grace.

[6] A medical experiment gone wrong and a man mutates due to side effects from an experimental drug administered to him, turning him into a fish-man.

When his supposedly girlfriend posts the story of her 'fishy' boyfriend on the internet, a wannabe reporter starts digging for the truth, covering the news about the mutant fish-man.

The film was number five on its opening weekend, with ₩578 million.