For the scene in Congressman Long's office, CGI was used the entire time for the fish that follow Evan around from the fish tank. Cafe FX, the visual effects company hired for the scene, ordered ten different kinds of tropical fish from a local store and studied their movements to imitate them on screen using computer animation. Jeff Goldman, the visual effects supervisor, stated "Early in the sequence, we mimicked the actual behavior of the fish in our animation, but as the scene plays out, the fish are a counterpoint to Steve Carell's comedic timing."