Roland Culver's voice was dubbed throughout, as was John Justin's.
One scene has cast with Sten sub-machine guns.
Victor Mature was so afraid of getting into the river because of the alligators' presence, that the crew members told him the alligators would hear gunshots and not move. Then Mature replied what about if one of them is hard of hearing. Alligators aren't African animals. The reptiles that worried Mr. Mature were crocodiles -- which, to his credit, are notorious maneaters.
Famous white hunter John Taylor is known for saying to always load your own rifle, never let another person do it for you.