Quick Answer
No confirmed platforms for Marine Boy right now. Search Crunchyroll, Netflix, and Amazon Prime below to check your region. The show is 65 episodes (~26h watch time).
Where to Watch Marine Boy
No confirmed streams for Marine Boy at the moment, but anime licensing changes fast. Check the platforms below — Crunchyroll and Netflix are usually your best bets.
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About Marine Boy
Yet another expansion of the Marine Boy series. This time 65 episodes were added to the 1966 series and all 78 episodes were sold to the US. The broadcast history of the show in Japan was slightly more complicated, with only the first 36 episodes of the 78 shown at first but later on all 78 were shown, out of which 65 are contained in this entry and 13 in the Ganbare! Marine Kid series. Marine is now equipped with an underwater boomerang, a hydrojet, and the mermaid Neptuna/Neptina has become...
Full details on MyAnimePulseFrequently Asked Questions
Where can I watch Marine Boy legally?
We don't have confirmed platform data for Marine Boy at the moment, but Crunchyroll, Netflix, and Amazon Prime are the most common homes for anime. Use the search links above to check what's available in your area.
Is Marine Boy 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 Marine Boy 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 Marine Boy.
Can I watch Marine Boy 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.