[5] Although the film was well-received by critics in South Korea, it was met with mixed reviews elsewhere, mainly criticising the cheap animation.

They are ruled by an old flatfish, whom they refer to as "The Master", who hides underneath a grate and instructs the tank's fish to prolong their survival by playing dead when humans approach the restaurant.

After witnessing the mackerel leap out of the tank in an unsuccessful escape attempt, the shocked farm fish christen her with the nickname "Padak" (or "Flappy").

Bar proposes that the king crabs in the tank below theirs are able to break the glass walls, and can be convinced to do so by Flappy, who can speak their language.

As the chef prepares other dishes, the Master witnesses the happenings within the restaurant and begins fearing for his life, only to be spared when the customer changes his order to mackerel.

There was supposed to be an additional scene after the Master escaped into the sea depicting Jooldom, Nollaemi, Bream, and Bar establishing a new cult, not unlike the one the Master once had, once a few more fishes are dropped into their tank, with riddles and everything, it was meant to further showcase the commentaries on human nature, but was cut due to time constraints.