Luca Brasi was the enforcer to the Corleone family. During The Godfather I, Luca goes missing after receiving a mission from the family. Later, a package is delivered to Sonny Corleone. Inside the package is a dead fish and a bullet proof vest. Tessio, a capo in the family then says, "It's a Sicilian message. Luca Brasi sleeps with the fishes"