 Although produced by different studios, it is obvious that the  exterior design of the "Nautilus" submarine as seen in the film was  heavily influenced by Harper Goff (qv)s "half crocodile/half  shark" Nautilus design in Disneys  _20000 Leagues Under the Sea (1954)_ (qv), especially with respect  to the subs top spar and rounded "eye" windows. In the original  Jules Verne (qv) novels of "20,000 Leagues Under the Sea" and  "Mysterious Island", the Nautilus is described as being rather  plain, basically a cigar