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Toho Company, Limited Monster
Godzillasaurus™ Copyright Icon
Godzillasaurus in Godzilla vs. King Ghidorah
Species Nicknames
Theropod Dinosaur

Godzilla, Godzillasaur,
Height Length
12 meters[1] 20 meters
Weight Forms
60 metric tons[1] Godzilla (Irradiated Form)
Controlled by Relationships
None None
Allies Enemies
None American Army and Navy
Created by Portrayed by
Shinji Nishikawa,
Kazuki Omori,
Tomoyuki Tanaka,
Shogo Tomiyama
Wataru Fukuda
First Appearance Latest Appearance
Godzilla vs. King Ghidorah Godzilla vs. King Ghidorah 
More Roars
You don't know about this dinosaur, you don't know what it was like, but I certainly do. He is close by, and he watches over all of us. I'm not sure where he hides, but he can see us, and if we ever become helpless and desperate, the dinosaur will come back to us and save us from tragedy and disaster, just as it did before on that doomed World War II battlefield we once faced. „ 

— Masukichi Ikehata (Godzilla vs. King Ghidorah)

Godzillasaurus (ゴジラザウルス,   Gojirazaurusu?) is a species of theropod dinosaur created by Toho that first appeared in the 1991 Godzilla film, Godzilla vs. King Ghidorah.


The Godzillasaurus is different from other theropods because its posture is more upright like a human, and it drags its tail on the ground, much like older theropod reconstructions. At 12 meters in height, it is much larger than any other theropod species, probably due to its erect posture. It has a smaller head than a real theropod, and has a double-row of teeth, much like a shark. The Godzillasaurus species is also different from other theropod dinosaurs due to the fact that it possesses a second, or "sacral", brain located in its hip to control lower body functions, like how the Stegosaurus was mistaken to have had a second brain. Godzillasaurus is also shown to possess tear ducts when Baby Godzilla is seen crying when Azusa Gojo is forced to leave him behind.

As is shown in Godzilla vs. Mechagodzilla II, Godzillasauruses seem to be telepathic, as Baby Godzilla can contact his father and Rodan telepathically. Since at this point Baby Godzilla had not yet been mutated, it is possible that all Godzillasauruses naturally have this ability. Professor Omae suggests that it is possible Godzillasauruses acted as brood parasites, laying their eggs in the nests of other species, due to the presence of Baby Godzilla's egg in a Pteranodon nest.


Heisei Series

Godzilla vs. King Ghidorah

The Godzillasaurus lived on Lagos Island in Godzilla vs. King Ghidorah, and was attacked by American soldiers during World War II. This was observed by some of the Futurians and a group of people from the present that had traveled back in time to remove Godzilla from history. The Godzillasaurus fought off the Americans, seemingly 'defending' a bastion of Japanese soldiers who were on the island at the time, but was gravely wounded after multiple naval ships bombarded it with shells and artillery. Badly injured, the Godzillasaurus fell to the ground. After the Japanese soldiers paid their respects and left, the Futurians transported the injured dinosaur to the Bering Sea, thinking that they had successfully altered the present day. However, this was not to be the case, as a nuclear submarine crash in the Bering Sea provided the energy to turn the Godzillasaurus into Godzilla, thus preventing the timeline from changing.

Godzilla vs. Mechagodzilla II, Godzilla vs. SpaceGodzilla and Godzilla vs. Destoroyah

Main article: Godzilla Junior.

Another Godzillasaurus, named Baby Godzilla, was found in Rodan's nest on Adonoa Island in Godzilla vs. Mechagodzilla II. This infant Godzillasaurus was raised by U.N.G.C.C. scientists and imprinted on a scientist named Azusa Gojo as its mother, but was adopted by Godzilla after Azusa was forced to part ways with him. Baby Godzilla lived with his new adopted father on Birth Island, where he was exposed to his radiation and mutated into Little Godzilla. As a toddler, Little Godzilla was already much larger than the seemingly adult Godzillasaurus found on Lagos Island. After living on the island for a year, Little Godzilla was exposed to a massive dose of radiation when uranium deposits on Birth Island ignited and exploded, mutating him into a sub-adult Godzilla dubbed Godzilla Junior. Godzilla Junior attempted to return to his birthplace on Adonoa Island, but was lured to Tokyo so that Godzilla would follow and battle the monster Destoroyah. Eventually, Junior was killed by Destoroyah, and the grieving Godzilla fought and killed Destoroyah with the help of G-Force. When Godzilla died of a catastrophic meltdown in his heart, the radiation he released was absorbed by Junior, reviving him and transforming him into a new Godzilla.


Despite its relatively small size, the Godzillasaurus that would eventually become Godzilla displayed a high amount of strength and endurance. Small arm's fire and even rocket launchers were unable to damage him, and only barrages from several battleships were the only things strong enough to draw blood and weaken it.

Video Game Appearances

Bandai Namco's Godzilla

Kaiju Guide

Godzillasaurus, the King Dinosaur

Kaiju Guide Godzillasaurus.png

A relic species of an ancient living being that once roamed all over the northern hemisphere. It is suspected that a living organism on the Island of Lagos in the Marshall Islands in the Pacific Ocean was later transformed into Godzilla. Though omnivorous and gentle, it has a habit of bravely confronting adversaries who dare step foot in its territory. Accounts of it repulsing advancing U.S. G.I.s from the island during the Pacific War endure to this very day.

Originally, the production team planned to have a Tyrannosaurus rex turn into Godzilla. However, this was shifted to the Godzillasaurus concept at the recommendation of the designers.

12 meters
60 tons
Powerful tail-strike
"Godzilla vs. King Ghidorah"


Main article: Godzillasaurus/Gallery.


Like many other monsters in the Heisei era, the Godzillasaurus' roar was "borrowed" from other kaiju: Rodan, extremely slowed down, and Gamera, slightly sped up, when he screams in agony.

Japanese Trailer

In Other Languages

  • Spanish: Godzillasaurio
  • Russian: Годзиллазавр
  • Portuguese: Godzillassauro


  • The Kujira from Terasawa's book
    In "Godzilla: A History," a book about Godzilla made by Kenichiro Terasawa, the main character of Godzilla vs. King Ghidorah, one of Terasawa's theories about how Godzilla came to be was that he was mutated from a whale, or kujira, that had Godzilla's dorsal plates.
  • An actual species of dinosaur was named the Gojirasaurus, in homage to Godzilla himself. However, this "Godzillasaurus" bears only a slight resemblance to its movie counterpart, and is a dubious genus - which means that it may be a different type of dinosaur altogether.
  • It is possible that Godzillasaurus is related to Therizinosaurus as it may be also a plant eater despite having sharp teeth (this is proven as of Baby Godzilla's diet). It is also possible that it is not a theropod at all and is instead a species of neo-prosauropod. This would explain its upright stance (some semi-bipedal prosauropods stood like this), its small head, its sacral brain and that it seems to be at least partially herbivorous. However, it could also be a descendant of Ceratosaurus and/or Skorpiovenator due to the similar skull structure, scales instead of feathers and four fingered hands.
  • However, in deleted scenes from Godzilla (1954), Godzilla vs. Biollante and Godzilla vs. Destoroyah, Godzilla and Godzilla Junior were seen eating meat (cows, the unmade monster Deutalios, and whales, respectively). This could be an indication that the diet of Godzillasaurus is omnivorous or even completely carnivorous, though this could be because of them being mutated and thus needing an appropriate change in their diets.
  • According to an interview with special effects designer Shinji Nishikawa, Godzilla was originally written to be a Tyrannosaurus prior to being mutated. Nishikawa, however, said he couldn't accept the idea that Godzilla was mutated from a Tyrannosaurus, so he came up with the idea for the Godzillasaurus and submitted concept art of it to Toho, who put it into the script for Godzilla vs. King Ghidorah.[2]
  • In Legendary Pictures' Godzilla, Godzillas were giant amphibious reptiles that evolved when Earth had ten times more radiation than it has today.
  • In Omni Productions' English dub of Godzilla vs. Mechagodzilla II, Baby Godzilla is called a "Godzillasaur" rather than a Godzillasaurus.


This is a list of references for Godzillasaurus. 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 The Official Godzilla Compendium. Profiles of the Monsters; Page 128.
  2. Shinji Nishikawa Interview

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Era Icon - Toho.png
Era Icon - Heisei.png
Era Icon - Godzillasaurus.png
Era Icon - Godzilla.png
Baby Godzilla
Little Godzilla
Era Icon - Godzilla Junior.png


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Gerdzerl Kinerfdamahnsters

2 months ago
Score 0
It should be noted that Godzillasaurus greatly resembles modern crocodilians and their prehistoric ancestors / relatives (such as crocodylomorphs, rauisuchians, and notosuchians) and actually has more in common, anatomical wise, with them than any known theropod (as of how we currently understand the majority of theropods to have likely looked). As such, it's possible that Godzillasaurus was merely mistaken for a theropod and could be a relative of crocodilians that convergently evolved an appearance and/or niche similar to theropods, much as how Thylacines displayed many of the same traits and adaptations as canines despite being marsupials.


2 months ago
Score 0
That could explain the Showa Godzilla.


3 months ago
Score 0
Is it ever explained how the Godzillasaurus survived the extinction?

The King of the Monsters

3 months ago
Score 0
No, it'e never addressed. With the 1954 Godzilla they explained that he survived living in a deep underwater pocket, but the Godzillasaurus appears to have somehow survived living on land.


4 months ago
Score 0
We need Godzillasaurus to appear in more places. Maybe Godzilla in some comic could be a mutant Godzillasaurus, and there are still other existing Godzillasaurus surviving secluded in some remote island. Then Godzilla's radiation exposure could lead to all of them becoming Godzillas.


4 months ago
Score 0