Mare Nostrum

Hughie Mack

Caragol (prologue)

Alice Terry

Freya Talberg

Antonio Moreno

Ulysses Ferragut

Mickey Brantford

Ferragut's Son - Esteban (as Michael Brantford)

Frédéric Mariotti

Toni - the Mate (as Fredrick Mariotti)

Madame Pâquerette

Doctor Fedelmann (as Mme. Paquerette)

Fernand Mailly

Count Kaledine

Andrews Engelmann

Submarine Commander (as André von Engelman)

John George

Servant (uncredited)

Apollon Uni

The Triton (prologue) (as Uni Apollon)

Álex Nova

Don Esteban Ferragut (prologue) (as Alex Nova)

Kada-Abd-el-Kader

Don Esteban's Son - Ulysses (prologue)

Mademoiselle Kithnou

Ferragut's Wife - Dona Cinta (as Mle. Kithnou)

Rosita Ramírez

Ferragut's Niece - Pepita