Quick Answer
Nadia: The Secret of Blue Water is streaming on Retrocrush, RetroCrush Amazon Channel. 39 episodes (~16h total watch time). Availability may vary by region.
Where to Watch Nadia: The Secret of Blue Water
Nadia: The Secret of Blue Water is currently on Retrocrush, RetroCrush Amazon Channel. Keep in mind that catalogs change by region — if you don't see it on your usual service, check the other platforms listed here.
Confirmed Streaming Platforms
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About Nadia: The Secret of Blue Water
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...
Full details on MyAnimePulseFrequently Asked Questions
Where can I watch Nadia: The Secret of Blue Water legally?
Right now, Nadia: The Secret of Blue Water is on Retrocrush, RetroCrush Amazon Channel. That said, anime licensing varies a lot by country — what's on Netflix in Japan might not be on Netflix in the US. If your go-to platform doesn't have it, try the other services listed above.
Is Nadia: The Secret of Blue Water on Netflix or Crunchyroll?
Can't confirm either right now. Both platforms rotate their catalogs pretty often, so it's worth searching directly on each one.
Is Nadia: The Secret of Blue Water available with an English dub?
Dub availability depends on the platform. Crunchyroll has been expanding their dubbed library a lot recently, and Funimation (now merged into Crunchyroll) historically had the biggest dub catalog. Check each platform's listing for Nadia: The Secret of Blue Water.
Can I watch Nadia: The Secret of Blue Water for free?
Crunchyroll offers a free ad-supported tier for some shows. Most other platforms require a subscription, but many offer free trials for new users. Tubi and Pluto TV occasionally have anime in their free rotation too.