Quick Answer
Leviathan: The Last Defense is streaming on Crunchyroll. 13 episodes (~5h total watch time). Availability may vary by region.
Where to Watch Leviathan: The Last Defense
Looking for Leviathan: The Last Defense? It's available on 1 platform right now. Scroll down for direct links and search options if it's not showing up in your country.
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About Leviathan: The Last Defense
The story is set in Aquafall, a fantasy world abound with water and greenery, and populated by dragons and fairies. Meteorites suddenly bring forth evil creatures that threaten all living things on the planet. The fairy Syrup assembles the Aquafall Defense Force, with three girls of the dragon clans as recruits. The story follows Syrup and the dragon girls Leviathan, Bahamut, and Jörmungandr as they work together to battle enemies and grow up. (Source: ANN)
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Where can I watch Leviathan: The Last Defense legally?
Right now, Leviathan: The Last Defense is on Crunchyroll. 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 Leviathan: The Last Defense on Netflix or Crunchyroll?
It's confirmed on Crunchyroll. Netflix availability depends on your region — some countries have it, others don't.
Is Leviathan: The Last Defense 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 Leviathan: The Last Defense.
Can I watch Leviathan: The Last Defense 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.