A shark repellent system for repelling sharks away from an individual during a water activity. The shark repellent system includes a band member and a transmitter unit attached to the band member that transmits underwater sound waves at a frequency undesirable to sharks. The band member is preferably comprised of an elastic material for snugly fitting about an ankle or wrist of an individual. The transmitter preferably includes a control knob connected to a frequency generator for allowing manipulation of the frequency of the sound waves generated by the transmitter unit underwater.