The Undersea Adventures of Captain Nemo

This a 1974/1975 Canadian animated TV show in which was filmed in Toronto, Canada. It follows an underwater adventurer named Captain Mark Nemo and his two assistants Christine and Robbie in a submarine called the Nautilus (“The Undersea Adventures of Captain Nemo,” 2021).

More on this series can be found on IMDB.

https://www.imdb.com/title/tt0244368/