Quick Answer
Blue Submarine No. 6 is streaming on Crunchyroll. 4 episodes (~2h total watch time). Availability may vary by region.
Where to Watch Blue Submarine No. 6
Blue Submarine No. 6 is currently on Crunchyroll. 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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More Ways to Watch Blue Submarine No. 6 (US)
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Anime licensing changes by region. If Blue Submarine No. 6isn't on your usual service, try these.
About Blue Submarine No. 6
The once famous and well respected scientist Zorndyke has bred a new genre of living being, one that thrives on the oceans and lives to destroy humans. Zorndyke believes it is time that the humans were relieved of their rule of the earth. It is up to Blue Submarine No. 6 and the rest of the Blue fleet to put an end to Zorndyke's madness and creations. (Source: ANN)
Full details on MyAnimePulseFrequently Asked Questions
Where can I watch Blue Submarine No. 6 legally?
Right now, Blue Submarine No. 6 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 Blue Submarine No. 6 on Netflix or Crunchyroll?
It's confirmed on Crunchyroll. Netflix availability depends on your region — some countries have it, others don't.
Is Blue Submarine No. 6 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 Blue Submarine No. 6.
Can I watch Blue Submarine No. 6 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.