Claiming to possess the ocean floor, Hall tries to build an autocratic submarine civilization. He starts to persecute the Dolphins. Astro stands up to preserve the peace on the ocean floor.
| Creator | Osamu Tezuka |
|---|---|
| Actor | Mari Shimizu, Kazue Tagami, Youko Mizugaki |
| Country | Japan |
| Production | Tezuka Productions |
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