Zamtrios are Amphibians introduced in Monster Hunter 4.


Zamtrios is a large, quadrupedal monster with grey-blue skin and yellow fins. It is superficially shark-like in appearance, with a long, pointed snout and a mouth filled with multiple rows of sharp teeth. Zamtrios is sometimes seen encased in an ice-like armor, which forms many spines and horns all over its body. As the adult form of Zamite, its limbs are powerful and fully-developed. Its skin is extremely elastic in order to accommodate its inflation abilities.

Behavior and Abilities

Zamtrios is a predator, known to launch surprise attacks on prey from beneath the sea ice. When sufficiently threatened or enraged, it will secrete a reactive fluid through its skin, which solidifies into an ice-like material, forming an "armor" over its skin to prevent damage. 

Zamtrios is capable of shooting powerful torrents of water from its mouth to blast away enemies. It can also travel beneath the ice to launch ambush attacks on prey. Using a specialized reactive fluid that is secreted through its skin, it is capable of encasing itself in an icy armor similar to that of Glacial Agnaktor. The armor also forms a long and jagged spear at the end of its snout. The reactive fluid that forms the armor can be spat by the Zamtrios to immobilize its prey. In addition, it can also fill itself with fluid and swell up to massive proportions. In this state it is capable of rolling and jumping on top of targets in an effort to crush them.


Zamtrios inhabits the icy Frozen Seaway and Polar Field.


The Japanese name Zaboazagiru is based on the Japanese words for "demon" and "frozen".

Game Appearances

In-Game Description

Monster Hunter 4
MH4U-Zamtrios Icon.png 両生種のモンスター。氷の下から獲物に襲いかかり、体温低下や氷結なので標的が行動不能になるのを待つ。 体内に蓄積する特殊な液体を噴出し、周囲を氷結させて身体に鎧のような氷をまとったり、想像を絶する変貌をとげる事から”化け鮫”とも呼ばれている。カエルを好んで食べる。
Threat Level (危険度): ★★★★
Monster Hunter 4 Ultimate
MH4U-Zamtrios Icon.png Amphibians that strike from frozen waters, using the cold to stun their prey. They secrete a special liquid that both coats their own body with icy armor and freezes any nearby foes. Frogs are their favorite food.
Threat Level (危険度): ★★★★
Monster Hunter Generations
MH4U-Zamtrios Icon.png Amphibians that strike from frozen waters, using the cold to stun their prey. They secrete a special liquid that both coats their own body with icy armor and freezes any nearby foes. Frogs are their favorite food.
Threat Level (危険度): ★★★★
Monster Hunter Stories
MH4U-Zamtrios Icon.png Amphibian monsters known for the astonishing changes that occur when they coat their bodies in icy armor.

Analysis and Guides

For details, see Zamtrios Guides.

Zamtrios Analysis for Monster Hunter 4
MH4-Zamtrios (Cutting Damage).png MH4-Zamtrios (Impact Damage).png MH4-Zamtrios (Shot Damage).png
Cutting Damage
(Click Image to Zoom)
(Coming Soon)
Impact Damage
(Click Image to Zoom)
(Coming Soon)
Shot Damage
(Click Image to Zoom)
(Coming Soon)
Brighter Red means more damage, while Darker Red means lesser damage.
Credits for the Images used above goes to kei_9 (ケイ) of Pixiv

Raw Hitzone Damage Data
Hitzone Cutting Damage Impact Damage Shot Damage
Element Hitzone Damage Data
Hitzone Fire.png Fire Water.png Water Thunder.png Thunder Ice.png Ice Dragon.png Dragon
This Monster is weakest to: Status Effect-Thunderblight MH4 Icon.png Thunder

Status Effects Data
Poison Paralysis Sleep Stun Fatigue Blast Mount
Initial Tolerance N/A N/A
Max Tolerance N/A N/A
Tolerance Increase N/A N/A N/A N/A N/A N/A N/A
Duration N/A N/A N/A
Damage N/A N/A N/A N/A N/A N/A
Item Effectiveness Data
Item Name Able
Normal Enraged Fatigued
Pitfall Trap Yes N/A N/A (?)
Shock Trap Yes N/A N/A (?)
Flash Bomb Yes N/A N/A (?)
Sonic Bomb Yes N/A N/A (?)
  • Sonic Bomb only works when Zamtrios is swimming.
Meat No N/A

Analysis Data Source/s:

MH4U Breakable Parts

Head (x1)
MH4U-Zamtrios Head Break 001.jpgIndent08.gifMH4U-Zamtrios Head Break 002.jpg
Right Leg (x1)
MH4U-Zamtrios Right Leg Break 001.jpgIndent08.gifMH4U-Zamtrios Right Leg Break 002.jpg
Left Leg (x1)
MH4U-Zamtrios Left Leg Break 001.jpgIndent08.gifMH4U-Zamtrios Left Leg Break 002.jpg
Top Fin (x1)
MH4U-Zamtrios Top Fin Break 001.jpgIndent08.gifMH4U-Zamtrios Top Fin Break 002.jpg
Tail (x1)
MH4U-Zamtrios Tail Break 001.jpgIndent08.gifMH4U-Zamtrios Tail Break 002.jpg


General Notes

  • It appears to use the Water element as well as the Ice element when enraged.
  • Zamtrios can be killed and carved in its inflated form.
  • Zamtrios can use its inflated form to hide its limping and fatigue.
  • While inflated, Zamtrios will sometimes drop a shiny from time to time.
  • Zamtrios' roar requires HG Earplugs to block.
  • Zamtrios gets its nickname Bakesame, literally meaning "Monster Shark", from its unbelievable transformation when it inflates itself and also from its transformation from an adolescent Zamite into an adult in such a short timespan.
  • Early concept art of Zamtrios was based on the Basking Shark and Frilled Shark.[1]
  • Zamtrios's tail and face can be broken, along with its fin and front legs.
  • When underground it can be affected by Sonic Bombs.

Monster Hunter 4 Ultimate

  • When enraged, Zamtrios will roar, then instantly form its armor.
  • Before attacking Zamtrios sometimes does a stance that looks like Nargacuga's "Prowler Stance", but unlike Nargacuga, Zamtrios can turn at the hunter before attacking and it could do any kind of attack depending what the hunter is doing, and where the hunter is.
    • When enraged Zamtrios can do this up to three times.
    • In G Rank, it takes lesser time to perform attacks while it is in prowler stance.
  • When Zamtrios takes a certain amount of damage while enraged or still has its armor on, Zamtrios will inflate itself several times bigger and will attempt to crush the hunter with its massive weight.
    • Fortunately because of its massive size and decreased mobility it leaves Zamtrios vulnerable to stronger attacks the hunter couldn't usually use if it was enraged.
    • Additionally, the longer Zamtrios is inflated and the more damage it takes, its skin will begin to turn red. When leaving this state Zamtrios will "deflate", releasing a gas that inflicts Iceblight if the Hunter is too close.
  • In high rank, Inflated Zamtrios can immediately roll after jumping backwards.
  • This monster can swim through ice leaving only the fin on its back visible, much like the Glacial Agnaktor.
  • Similar to the Glacial Agnaktor, using Fire element weapons will melt the ice on Zamtrios's body.
  • In G Rank, Zamtrios can do a 360º sweeping water beam.
  • It can be infected by the Frenzy Virus.
  • Like Plesioth and Gobul, Hunters can use Frogs to fish them out.
  • During the localization process, the other potential name candidate for Zamtrios was Gnathalos.

External Links

New MH4U monster names unveiled at Japan Expo
Monster Hunter 4 Ultimate: Localization & The Jaws of Life!

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