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Basarios Art
English: Basarios
Japanese: バサルモス
Korean: 바살모스
Nicknames: Basa
English: Unseen Peril
Japanese: 岩竜
Korean: 암룡
General Information
Species: Flying Wyvern
Element/s: Status Effect-Fireblight MH4 Icon Fire
Ailment/s: StatusEffect05 Poison
Status Effect-Deadly Poison Deadly Poison
StatusEffect01 Sleep
Status Effect-Fireblight MH4 Icon Fireblight
Status Effect-Severe Fireblight MH4 Icon Severe Fireblight
Weakest to: Status Effect-Dragonblight MH4 Icon Dragon
Status Effect-Waterblight MH4 Icon Water
Weakness Sign: Limping
Signature Move: Fireball Spew, Fire Beam
Habitats: Old Swamp
Old Volcano
Volcanic Hollow
Monster Size: Gold Crown Large 1712.8
Gold Crown Small 1154.9
Monsters in Relation: Ruby Basarios, Gravios, Black Gravios
Generation: First

Basarios is a Flying Wyvern first introduced in Monster Hunter.

MH4-Basarios Render 001


Basarios is a small, rocky wyvern. It is the juvenile form of Gravios. Its hard, stone-like shell can be used for protection against other large wyverns, doubling up as effective camouflage when Basarios partially buries itself in the ground.


It is able to release either sleeping or poisonous gas from its underside and, on extremely rare occasions, a fire plume. It is also known to unleash a very powerful lava beam at times. It can also hurl balls of fire like a Yian Kut-Ku, although it prefers to charge towards adversaries.

When resting or changing areas, it burrows underground, exposing only its back, giving it the appearance of a large gray rock. Being very heavy, it is a slow mover, and although it has wings, it rarely uses them to fly. Even when it does, its weight allows it to fly only for a short time.

Despite its ability to hide, in most areas it is visible. This is because the rocks on its back are a slightly lighter color than other rocks.


Basarios charges in a manner similar to Diablos or Monoblos, although it is slower and cannot turn as sharply. It is less aggressive than its adult form, Gravios.


Basarios live in Volcano and Swamp regions, which contain lots of ores for them to consume. They have also been spotted in the Everwood.

Other Non-Subspecies Forms

Hard Core (HC) Basarios

FrontierGen-HC Basarios Render 001 (Edited)

In Monster Hunter Frontier Online Season 9.0, a 'Hard Core' Basarios is introduced. They have a branch in one of the rocks on their back, bright blue eyes and purple stains around their stomach pores.

These unique Basarios can now fire 3 heat-beams in rapid succession, followed by a burst of poison gas; they can roll-over to try to crush the hunter, and emit poison at the same time; theycan dig and partly re-emerge to spew a powerful ball of fire; they can also leap at the Hunter. Their normal fire-ball attacks are also now much improved.

Game Appearances

Chronological Appearances
First US / EU Appearance: First JP Appearance: Latest Appearance:
Logo-MH1 (2004) Logo-MH1 (2004) Logo-MH4U (2015)

In-Game Description

Monster Hunter Freedom 2 / Monster Hunter Freedom Unite
MHFU-Basarios Icon A large wyvern found in volcanic zones. They are the juvenile form of the Gravios. They have a steel-like carapace that requires powerful items to crack. Emits poison gas.
Monster Hunter 4
MH4-Basarios Icon グラビモスの幼体で、別名”岩竜”。 鉱石のように硬質化した外殻が特徴。 多くは地中に潜り、岩に擬態しているため、不用意に近付いた採掘者達が被害を受ける例が報告されている。 強烈なダメージを与えるには、爆弾の使用が効果的。 時折、毒性のガスを排出する。
Threat Level (危険度): ★★★★
Monster Hunter 4 Ultimate
MH4-Basarios Icon These juvenile Gravios are famous for their rock-hard carapaces. They often borrow underground, mimicking rocks and savaging oblivious miners. They are known to emit poison gases and are especially weak against bombs.
Threat Level (危険度): ★★★★
Monster Hunter Frontier G
MHFG-Basarios Icon (?)
Monster Hunter Online
MHOL-Basarios Icon 岩龙平时潜伏在地面之下,只把背部露出地表,远看酷似岩石。当敌人接近,它就会地面下一跃而出,给予对手重创。


  • Basarios takes 1.1x as much damage when underground.
  • Basarios, along with Gravios, Bulldrome, Gigginox and its subspecies are the only monsters able to be flipped over on their backs when enough damage is done to either of their legs or by knocking them out with an impact weapon.
    • When knocked out, just like Gravios, Basarios will be flipped over on its back, where it will flail its wings helplessly, causing the wind effect.
  • Basarios' tail is the smallest in the Monster Hunter world when cut.
  • Basarios' chest can be broken once, and once this occurs the area becomes much more vulnerable to damage.
  • Unlike the Gravios, Basarios has two horns.

  • The Basarios stays in only one area, Area 2 of the Old Volcano and Area 7 of the Old Swamp; it will never leave these two areas.

  • High Rank or G-Lvl Basarios uses a higher caliber poison than a regular Basarios, should its stomach be broken. This poison drains health twice as quickly as normal poison would. One can tell when Basarios is using this stronger poison; the cloud will be a darker purple and contain poison bubbles within it.

  • When encountered in the Everwood it is covered in moss.
  • Basarios' back can now be broken and mined for ore.
  • Its stomach can now be climbed on and attacked.

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