30,000 Miles Under the Sea (Kaitei 30,000 maru) (1970)

Japanese Animation (1950s-1970s) (372 items)
list by davidcartoons

Anime Stand Alone Movies 1960's-1970's (16 items)
list by almozayaf666

King Magma VII, the ruler of the underground world, is planning to conquer the whole world. Riding the fire dragon Isamu (a young boy) and Angel (the princess of the undersea kingdom), try to stop him from destroying their world with the help of their loyal friends, Tail and Octopus.