Johnny Weissmuller (Tarzan)
Brenda Joyce (Jane)
Linda Christian (Mara, A Mermaid)
George Zucco (Palanth)
John Laurenz (Benji)
Fernando Wagner (Varga)
Matthew Boulton (British Inspector-General)
Edward Ashley (Commissioner)
Andrea Palma (Luana)
Gustavo Rojo (Mara's Fiance)