Marine Boy was one of the first color anime to be shown in a dubbed form in the U.S., and later in Australia and the United Kingdom. It was originally produced in 1965 in Japan as Undersea Boy Marine (海底少年マリン, Kaitei Shōnen Marin) by Minoru Adachi and animation company Japan Tele-Cartoons. It was sold outside Japan via K. Fujita Associates Inc., with Warner Bros.-Seven Arts Television handling worldwide distribution of the English-language version. The series was distributed in syndication in the United States starting in 1966.