The title refers to Martin's nickname for Andrea, inspired by her habit of swimming on her stomach, and serves as a metaphor for characters caught in a cycle they cannot escape, much like fish in an aquarium .
The film tells the story of , a reserved young man who works in an aquarium shop. Phillip has a passion for fish; he understands their silent world, their movements, and their fragility. However, in his human interactions, Phillip is deeply withdrawn. He is living a life of routine and isolation, hiding a core part of his identity from his family and the world. The title refers to Martin's nickname for Andrea,
So, what happens when a fish starts swimming upside down? In some cases, it might be a sign of a health issue or a problem with the fish's environment. Here are a few possible explanations: However, in his human interactions, Phillip is deeply
, a woman with no past who begins a relationship with Philipp. As the summer progresses, Andrea also forms an intimate bond with Martin, leading to a destructive love triangle filled with desire, jealousy, and guilt as both men vie for her affection. Nina Schwabe as Andrea. Henning Kober as Philipp. Theo Trebs as Martin. Filmuforia Where to Watch In some cases, it might be a sign