Nadia: The Secret of Blue Water is a tV series anime that premiered in spring 1990, produced by GAINAX.

About the production: the story comes from an original script, there are 39 episodes of about 25 minutes and its current status is "finished".

Its main genres are adventure, comedy, romance and sci-fi, with themes such as Historical, Ships, Steampunk and Coming of Age.

On AniList, Nadia: The Secret of Blue Water has an average score of 73%, a good score, and appears on 26,007 users' lists.

The franchise continues in or follows from: Fushigi no Umi no Nadia: Original Movie.

In 1889, the world is on the pinnacle of great discoveries in technology. In mankind's grasp for the future, a sinister foe known only as Gargoyle, obsessed with restoring the former Atlantean empire to the glory it once held, begins his plans to take over the world. Nadia, with the help of a young inventor, Jean Raltique, and the mysterious captain Nemo of the submarine Nautilus, must fight to save the world from Gargoyle and Neo-Atlantis. Based on the Novel '20,000 Leagues Under the Sea' by Jules Verne. (Source: Anime News Network)

Official synopsis from AniList.