Yep. That dude's a fish. And something of a media celebrity. Welcome to the very odd world of Kwon Oh-kwang's TIFF selected comedy Collective Invention.
Young and unemployed Gu is desperate to make some money and participates in a clinical trial for a pharmaceutical company's new drug. As an unknown side effect, he slowly transforms into a fish. This bizarre situation becomes Korea's hottest news and fish man Gu is catapulted into the spotlight and becomes a superstar, only to fall from grace just as quickly.
Yup. Fish man. Marvel at this particular oddity in the trailer below.