Hell Ship Mutiny (1957)

Jim Knight is the captain of a ship trading in the South Seas. He runs into trouble when he makes port at an island where crooks Malone and Ross hold the natives under their cruel domination while they seek a fortune in pearls. Knight and his crew are taken prisoners and he falls for native princess Mareva, and her non-plump charms are more than enough motivation for Knight to put an end to Malone and his henchmen, and also the the greedy police commissioner Lamoret.