The main concept of the girl's blank face is representative of her unknown identity and her ability to put on any mask she wants. It was photographed and rendered to look like a painting, as paintings are a motif found at both the beginning and end of the documentary. Hand-rendered type was used for the logomark because of its play on artists signatures found on paintings. There is an emphasis on the terminal of the letter "T" to appear as an abstracted hook, which is related to the idea in the movie that catfish "hook" people into online relationships.
There are also a few "digital" additions throughout the design. The bar showing the film's directors is a nod towards Facebook's tagging system, as it is a motif that is found throughout the movie.