When the theme song for the show, previously recorded in New York, was lost in the mail, one of the program's directors, Leon Rhodes, and the show's sound man, Jack Sky, wrote and recorded a new song in one day.
Series creator J. Anthony Ferlaine carved the puppets, manufactured Diver Dan's helmet and sewed Miss Minerva's mermaid costume.
Two giant fish tanks, one for long shots and the other for close-ups, were manufactured so the cameraman could film the action with live fish swimming in the foreground.
The only fish used in the fish tanks were goldfish, because they were the only species available that would swim at different levels in the tank.
The actors and voice specialist Allen Swift prerecorded all their lines, then lip-synched their actions when the cameras were rolling.