- Order: Saurischia
- Suborder: Wyvern Feet
- Infraorder: Strange Wyvern
- Superfamily: Venom Wyvern
- Family: Nox
- Species: Gigginox
The Gigginox is known to live in the Tundra though migrates to other cave systems in different regions, leaving behind its offspring.
Gigginox are high in the food chain within their caves. Gigginox are known to feed on Baggi, Popo, Anteka, and Bullfango. Gigginox rarely leave the caves they inhabit due to the threat of other large predators such as Tigrex, Glacial Agnaktor, Stygian Zinogre, Barioth, and Brachydios.
The average size of an adult Gigginox is approximately 1092.0cm. Just like Khezu, it produces a similar mucus-like substance on its body. This substance isn't really produced while its calm, making it look dry, it is mainly produced when Gigginox is enraged. When enraged, it combines the toxins with the mucus, giving it a darker appearance. On the Gigginox's face, underbelly, and tail are poisonous organs. These organs are used to produce a toxic poison that is produced in a "glob" form but, spreads out in a "fog-like" form. Gigginox spits the globs of poison on the ground because if its able to get a prey item to inhale enough of the poisonous gas, the creature will likely die. Unlike Khezu, Gigginox doesn't smell for prey, rather Gigginox uses specialized heat organs to detect prey. The red underside of Gigginox has many tiny hairs on them. This allows Gigginox to hang onto ceilings and walls.
The Gigginox is highly territorial, staking out a cavern or other such area to lay its eggs. During the day, they sleep much longer than most other monsters in the area but at night they become truly active. They will spend sometime awake during the day but if they instantly sense potential prey in the area, they will actively stalk the creature in the caves. Said prey items are later left behind as corpses in caves to make it easier to catch prey. Despite a Gigginox's looks, they are considered to be quite intelligent compared to some other Flying Wyverns. Gigginox even save food in their caves.