Gravios are Flying Wyverns introduced in Monster Hunter. They are known to inhabit subtropical zones and can be encountered at low, high, and G-Ranks.
Gravios are covered in a dense, stone-like armored shell which protects their body from physical damage. They are very large in size, towering over most other flying wyverns and measuring several dozen feet in length. Because if their size and incredible weight, they are only capable of limited flight, despite having large and seemingly-developed wings. They have a thick tail with a mace-like club at the end.
Gaps in the Gravios' underside expel a knockout gas potent enough to put many monsters to sleep. This gas is produced inside the Gravios' body. They appear to have lost their ability to use poison gasses as they matured. Furthermore, these defense mechanisms may be used to deter would-be predators, although there would be few monsters able to penetrate the Gravios's shell. Gravios can also expel flammable gas as a waste product of their 'heat beam', and of their diet.
Gravios are relatively docile until provoked. Like most wyverns, they are fiercely territorial. The Gravios inhabits large areas of the Volcano, where they are sufficiently large enough to incubate and raise their juvenile Basarios.
Gravios can be found in the Volcano and Swamp. They can easily withstand the heat of molten lava, and traverse it at will. Gravios eat rocks and minerals for nutrients.
Other Non-Subspecies Forms
Hard Core (HC) Gravios
It appears to be an older Gravios than usual due to further growth of spikes and muscles. This orange eyed living tank has an improved high speed beam sweep that, once charged, is able to sweep across in only 1 second making it both easy to avoid when timed correctly and deadly if not evaded. The beam is so strong the Gravios itself almost falls over.
It also has a new charge attack where it steps back while turning towards its intended target to then charge forward by jumping and sliding instantly at high speed finished by slamming the ground.
It also has a new tail attack where it walks forward then lifts its tail in the air slowly as if charging a attack then swinging it fast and violently, causing great damage.
Gravios can put its enemies to Sleep with a gas emitted from pores around its body.
The stomach can be broken twice - the first will reveal the monster's muscle layers, while the second makes the break in its stomach larger. Once this happens, the stomach will receive more damage.
When its legs receive a great deal of damage, it will roll over, dealing damage to whatever it hits. Gravios will also roll over when KO'd.
It can be determined which kind of beam it will do by the sound of its voice. When it is higher pitched, its fire beam will go side to side.
At some time in battles, Gravios may seemingly fly up. However, it should be noted that there is no wind effect as with other monsters, and it will follow up by slamming its body down on the ground, inflicting some medium damage and creating a wide area quake effect.
The fire beam can be blocked using the Guard Increase skill - however, it cannot be completely blocked even when using Guard +2 and Guard Increase simultaneously - the hunter who has blocked the strike will still take damage.
Using Flash Bombs can blind a Gravios for roughly 10-15 seconds.
The red gas that comes after the beam can be predicted, as the Gravios will emit small black smoke around its body.
Gravios' back-plates, legs, wings, and face can broken for the first time.
Its stomach can now be climbed on and attacked.
When low on stamina it will fail to shoot its heat beams, produce gas, and take longer to recover from attacks.
It can become infected by the Frenzy Virus and affected by the Extreme Status.
There is an Event Quest where you can hunt a small Gravios which is about the size of a Basarios.