Trivia: Nadia: The Secret of Blue Water

  • Cross-Dressing Voices: Averted in the dub: the three lead roles are played by actual kid actors instead of adult females.
  • Hey, It's That Guy!/Pop-Star Composer: Yukihiro Takahashi, from Sadistic Mika Band and Yellow Magic Orchestra was one of the composers for the show.
  • Hey, It's That Voice!: Gargoyle is played by Motomu (Kozo Fuyutsuki, Walter Dornez) Kiyokawa; Marie is Yuko (Mihoshi, Chocolat, Excellen, and Sora) Mizutani.
    • Then there's Noriko Hidaka (Jean), Yoshino Takamori (Nadia), and Kikuko Inoue (Electra), who all went on to work together again as Erica, Hanabi, and Lobelia, respectively, in Sakura Wars 3 and 4 — and that's not even getting into all of the things each actress has done individually.
    • Captain Nemo is voiced by Akio Ohtsuka. Also known as the voice of Solid Snake.
    • The English dub by ADV has Lord British as Captain Nemo.
    • In the old Streamline dub, Marie was voiced by Angelica Pickles! Now you will NEVER unhear it!
      • In the same dub, Wendee Lee voiced Nadia. In a European-International-ish accent, no less!
    • In Italy, Jean is Sumo.
  • Similarly Named Works: Secret of Cerulean Sand
  • Troubled Production: Aside from the unexpected decision to extend the show to 39 episodes (hence the Korean-animated filler arc), there were other problems plaguing the show's production progress. Anno reportedly disliked the original script for the show, and decided to rewrite it from scratch. Furthermore, any "suggestions" from NHK on how to "improve" the show were instantly disregarded, hence the Darker and Edgier tone for most of the canonical episodes. Because of Anno's demand for perfectionism, many episodes ran late, with Anno spending more than eighteen hours per day on the show! At one point, after episode 20 was broadcast, it took an entire month for audiences to see the subsequent one. The budget for the show also caused Gainax to lose more than 800 million (half a million dollars!) in finances. They were also denied any of the rights. Perhaps because of this, neither Gainax nor NHK worked together on another show, while Anno fell into the heavy bout of depression that led to Neon Genesis Evangelion.