The Sharkfighters

In spite of the persistent rumor that special effects artist Russell Shearman was attacked and killed by a shark while filming underwater in the Caribbean Sea off Cuba, his May 8, 1956 obituary in the Los Angeles Times states that he and was "electrocuted while repairing equipment" for the film. He was taken to the nearest hospital but was dead on arrival. Serving as the picture's "chief technician", he was renowned for the "development of many machines and gadgets used in motion-picture production", said the Times, and was not an underwater cameraman or working as one when electrocuted.

Although the film is supposed to take place in the summer of 1943, the plane Lt. Commander Staves disembarks from on the Isle of Pines carries post-World War II national insignia on its fuselage and wings.