Why is the movie called catfish?

The movie is called "Catfish" because it explores the concept of deception and identity in online relationships, similar to how catfish are known to stir up trouble in fish tanks by keeping other fish active. The term also refers to a specific incident in the film where one character creates a false identity online, paralleling the behavior of catfish in the digital world. Ultimately, the title symbolizes the unexpected truths that emerge when the facade is stripped away.