All three of the Gappas share the same characteristics, as they are based on various reptiles and birds such as eagles and hawks. Overall, they resemble enormous bipedal griffins. As exhibited in the two adults seen in the film, the species is sexually dimorphic. The female has a smaller head crest and has a flatter face compared to her mate. Their scales are triangle-shaped, and their eyelids are the reverse to that of humans. The Gappas' wings are unlike those of birds; they are actually evolved ribs.
In ancient times, the Gappas would fight other monsters for survival. They were already present when Earth was still an interstellar cloud, suggesting that the Gappas originated in outer space.
- Gappa (1967)
- Amorous Family: Like a Fox and a Racoon (1972) [prop]
- Yuzo the Biggest Battle in Tokyo (2022) [toys]
An expedition to Obelisk Island by Mr. Funazu uncovers a baby monster, who hatches from an egg near a sacred temple. The natives plead with the skeptical scientists not to take the baby away, lest it anger the baby's parents. Sure enough, they take the baby away, and soon, inside the caverns, its two parents rise from the underground waters beneath the volcano, destroying everything in their path. Saki, the only survivor, is rescued by an American Navy fleet and brought back to Japan.
The parents storm across Japan, destroying all in their wake, but their assault ceases once they recover their baby. Mercifully, they relent and depart to return to Obelisk Island.
The Gappas can fly at a maximum speed of Mach 6.
The Gappas have a maximum underwater speed of 150 knots.
Radiant Heat Beam
The adult Gappas can fire a 4,000-degree Celsius Radiant Heat Beam (放射熱光線 Hōshanetsu Kōsen) from their mouths. This is described as being "comparable to a death ray" in the film, it can also burn or melt anything it makes contact with. This ability is also speculated in the film to make the Gappas immune to poisons.
The Gappas emit bioluminescence from their eyes, which appears blue-white underwater and yellow on land.
The female Gappa possesses a pearl-like substance within her body, likely stored in her legs. This substance can cause humans to go blind.
The baby Gappa's body is electrified and causes electric arcs/sparks whenever metals are attached to its body. This may suggest that adult Gappas are also able to emit electricity.
- Main article: Gappa/Gallery.
- Stock footage of the adult Gappas appears in an episode of the British sci-fi comedy series Red Dwarf, "Meltdown", where they are enormous wax-droids roaming the Prehistoric World section of an abandoned theme park. Though intimidated, the mechanoid Kryten quips "I can't believe how feeble and improbable those creatures were, sir. I've seen more convincing dinosaurs given away free with a packet of Wheaty-Flakes."
- An anatomical illustration noted that Gappa could emit "heat wave beams" from their eyes.
- Gappa is one of numerous kaiju summoned in Natsuhiko Kyōgoku's USO MAKOTO Yōkai Hyaku Monogatari book series.
This is a list of references for Gappa. 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: 
Showing 17 comments. When commenting, please remain respectful of other users, stay on topic, and avoid role-playing and excessive punctuation. Comments which violate these guidelines may be removed by administrators.