The mouth harp is a traditional musical instrument that is played by blowing into it. Often referred to as a Jew's harp or a jaw harp, the mouth harp has fascinated people throughout history. The word "harmonica" is also used as a synonym for the mouth harp. Another term that is sometimes used is the "tromba marina." Interestingly, this term actually refers to a completely different type of instrument, but is occasionally used as a synonym for the mouth harp as well. Other terms that are sometimes used to describe the mouth harp include the juice harp, the trump, the morsing, and the Ozark harp.