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A group of Seatopians
Leader Emperor Antonio
Pawns Megalon
Jet Jaguar (temporarily)
Average height 2 meters[1]
Average weight 100 kilograms[1]
Homeworld Earth (Seatopia)
Allies M Space Hunter Nebula Aliens
Enemies Humanity
First appearance Latest appearance
Godzilla vs. Megalon Godzilla vs. Megalon (2023)

The Seatopians (シートピア海底人,   Shītopia Kaitei Hito, lit. Seatopia Seabed People) are a race of underground people which first appeared in Godzilla vs. Megalon.


Showa era

Godzilla vs. Megalon

The Seatopians are an illustrious race, ruled by Emperor Antonio. They were the first civilization to inhabit the Earth, and reside in a huge subterranean country called Seatopia, home to massive underground and underwater cities which resemble those constructed by the people of Ancient Greece, the Roman Empire and Easter Island. Seatopian history can be traced back as far as at least 3,000 years ago, when their nation sunk below the ground, becoming the subterranean kingdom it is in the present day. Following the dawn of the Atomic Age on the surface, the Seatopians watched with anger as the humans destroyed and flaunted the earth they saw as theirs. At first, the race remained quiet, despite the mounting damage to their underground cities as a result of nuclear tests on the surface.

The final straw came when a massive test undertaken near the Aleutian Islands near Alaska in the 1970s sent a huge earthquake across the Pacific Ocean, simultaneously destroying Monster Island and inflicting massive damage to Seatopia's capital city.

To combat the humans of the surface, the Seatopians looked to their god, Megalon for assistance, and then contacted the M Space Hunter Nebula Aliens, obtaining Gigan for their use. They then sent the kaiju to attack Japan, and watched closely as the destruction of Japan mounted. Ultimately, they were thwarted when Godzilla and Jet Jaguar repelled the alien monster duo. The Seatopians then decided to continue their lives by sealing themselves away, but continued to scheme against those who they saw to be destroying the Earth.

Video games




  • The Seatopians' intentions and motivations are unique among most other enemy races in Toho films. While most of the other aliens intended to take Earth for themselves, the Seatopians, being residents of Earth, attacked the humans because they felt that the Earth was being mistreated by them.
  • According to an interview with Chris Mowry conducted by Toho Kingdom, the Seatopians were included in early story pitches for Godzilla: Rulers of Earth, but IDW Publishing was unable to acquire the rights to human or alien characters from Toho films and replaced them with the Devonians. Likewise, the M Space Hunter Nebula Aliens were replaced with the Cryogs.[2]


This is a list of references for Seatopian. These citations are used to identify the reliable sources on which this article is based. These references appear inside articles in the form of superscript numbers, which look like this: [1]

  1. 1.0 1.1 Godzilla Giant Monsters Super Encyclopedia (4th ed.). Kodansha. 15 March 1994. p. 31. ISBN 978-4063042702.
  2. Interview: Matt Frank and Chris Mowry - Toho Kingdom


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