While covering a test of guided torpedoes, two reporters believe they see what appears to be a strange-looking swimming creature. They investigate the matter further and discover that there is a race of fish-men living under the sea. The fish-men capture the pair and keep them prisoner in their underwater city.
Sonny ChibaKen Abe
Peggy NealJenny GleasonFranz GruberCommander BrownAndrew HughesErik NeilsonDr. MooreMike DaneenDr. Josef HeimBeverly KellerGunther BraunSubmarine captainKoji MiemachiTadashi SuganumaNishida
Hideo MurotaHenchmanOsamu YamanouchiKosaku OkanoNakamuraIchiro MizukiAkemi FujiFemale researcher
