Foreshadowing in "The Godfather" Scene

Agreeing and adding to Melisa's statements, there is subtle (forgettable, but still very noticeable) foreshadowing in the scene where Luca Brazi is killed. In the scene where he is entering the building, the audience sees Luca Brazi through glass, and then as the camera focuses on the fish on the glass, the audience notices the fish. Even though this foreshadowing isn't that subtle, when the viewer focuses on the plot, the fish seem to be quickly forgotten. The reference isn't returned to until Sonny recieves the package of fish, signifying that "Luca Brazi sleeps with the fishes". I think it's interesting how this piece of foreshadowing signifies that 'this is the place where Luca Brazi will sleep with the fishes'- like a premonition before death.