Monster Hunter Wiki


11,611pages on
this wiki
Lagiacrus Discussion SYMBOL Talk

MHRoC-Lagiacrus Art 001
English: Lagiacrus
Japanese: ラギアクルス
Korean: 라기아크루스
Nicknames: Lagi, Lagia
English: Sea Wyvern,Lord of The Seas
Japanese: 海竜
General Information
Species: Leviathan
Element/s: Status Effect-Thunderblight MH4 Icon Thunder
Status Effect-Waterblight MH4 Icon Water
Ailment/s: Status Effect-Thunderblight MH4 Icon Thunderblight
Status Effect-Waterblight MH4 Icon Waterblight
Weakest to: Status Effect-Fireblight MH4 Icon Fire
Weakness Sign: Limping
Signature Move: Thunder Burst
Habitats: Deserted Island, Flooded Forest
Monster Size: Gold Crown Large 3310.6 cm
Gold Crown Small 2357.2 cm
Monsters in Relation: Ivory Lagiacrus,
Abyssal Lagiacrus
Generation: Third

Lagiacrus is a blue Leviathan that mostly dwells in the sea/deep bodies of water and comes onto beaches to sunbathe. It has a hood-like crest on its neck to aid in sunbathing. Lagiacrus is the flagship monster of Monster Hunter 3.

3rdGen-Lagiacrus Render 001


When a Lagiacrus is fully sunbathed, it turns a dry grayish-blue color and its dermal spikes turn a pale red, such as in the picture above. When it returns to the water, Lagiacrus regains a striking deep blue color and its spikes return to their original color of a very light beige.


The dermal spikes on its back glow white when it is using strong thunder attacks, and its mouth gurgles with Thunder when it is enraged.


Lagiacrus is found only at the Deserted Island and Flooded Forest. It's most at home underwater, but is more than capable of fighting on land.

Game Appearances

Chronological Appearances
First US / EU Appearance: First JP Appearance: Latest Appearance:
Logo-MH3 EN (2010) Logo-MH3 JP (2009) Logo-MH3U (2013)

In-Game Description

Monster Hunter 3
MH3-Lagiacrus Icon Known as Sea Wyverns, Lagiacrus are at the top of the aquatic food chain. Feared by sailors as 'The Lords of the Seas', they store enough electricity in their spinal organs to make the oceans surge. Occasionally seen resting on land.
Monster Hunter 3 Ultimate
MH3U-Lagiacrus Icon Leviathans that exist at the top of the aquatic food chain. Feared by sailors as the "Lords of the Seas", Lagiacrus store enough electricity in their spinal organs to make the oceans surge. Occasionally they can be found resting on land as well.

Breakable Parts


Element/Status Effectiveness

Element Damage
Hitzone Fire Water Thunder Ice Dragon
Head 15 0 0 5 5
Neck 15 0 0 5 5
Back 25 0 0 15 15
Body 30 0 0 10 10
Tail 15 0 0 5 5
Foot 15 0 0 5 5
Status Effect
Poison Paralysis Sleep Fatigue Stun
Initial Tolerance 180 180 180 180 150
Tolerance Inc. (max) +130 (700) +150 (780) +130 (700) +120 (660) +150 (750)
Tolerance Recovery 5/ 10 sec 5/ 10 sec 5/ 10 sec 5/ 10 sec 5/ 10 sec
Duration 60 sec 10 sec 30 sec --- 10 sec
Damage 150 + 5 --- --- 200 ---

Item Effectiveness

Item Effect
Item Name Able Effectiveness Duration (1st time) Duration (2nd time) Notes
Pitfall Trap ★☆☆ Works only when on land.
Shock Trap ★★☆ Works on land and underwater.
Flash Bomb ★★☆
Sonic Bomb ★☆☆ Flinches and drops a shiny item
Dung Bomb ★★☆
Meat x ☆☆☆

Damage Effectiveness

For the damage formula (how it's calculated), hitzone charts, Lagiacrus info and more click the following links: Monster Hunter 3 Damage Formula or Monster Hunter 3 Hitzone Charts. Images created by Inkoseh.


  • Lagiacrus is the first Leviathan of it's kind to be encountered in Monster Hunter 3.
  • Lagiacrus shares many condition with Rathalos:
    • Both held the title of a flagship monster.
    • Even though they are flagship monsters, they don't have their own theme music.
    • Both are weak to each other's elemental powers.
    • Both appear in Tri's opening movie.
    • Both have their subspecies appear in MH3U's opening.
    • Both have a subspecies that inhabits the same habitat as them and a rare species that shares habitats with Elder Dragons.
    • Both are the only old flagship monsters that can be fought in 3U's low ranked quests.
  • Breaking its dermal spikes reduces its ability to use electrical attacks.
  • When low on stamina, it will fail to use it's electrical charge attacks.
  • Hitting Lagiacrus with any kind of bomb (including Sonic Bombs and Crag/Cluster shots) underwater, may cause it to drop an item (Shiny).
  • A Lagiacrus either will eat an Epioth, or come up on land for air to recover Stamina - however, both often give no indication of Stamina recovery.
  • Lagiacrus roar underwater has the same effect as a Sonic bomb on monster.
  • The Lagiacrus is the biggest Leviathan that dwells in the water, since the Ceadeus is considered an Elder Dragon.
  • When Lagiacrus hits an underwater pillar or a rock and destroys it, it may drop a 'Shiny' (Offline mode only).
  • The Lagiacrus is one of the only two monsters in Monster Hunter Tri to have a weapon in every category. The other is Alatreon.
  • Lagiacrus does not return in Monster Hunter Portable 3rd. However, it does appear in MH Diary: Poka Poka Airu Village, and returns in Monster Hunter 3 Ultimate and MH Diary: Poka Poka Airu Village G.

  • When encountered for the first time offline, in the 1* Village Quest: "Guts- It's what's for dinner"; Lagiacrus cannot be killed. Its body parts can be broken, and its tail can be carved, but it will only go as far as limping, and cannot be killed until the Urgent Quest in the Village.
  • When present in Deserted Island , Lagiacrus will, on rare occasion, leave the water and venture no further inland than Area 5.
  • Even if the Lagiacrus' tail is cut or its parts broken in the "Trial of the Sea Dragon" urgent quest, it will return in "Fell the Lagiacrus" healed and unwounded.

Start a Discussion Discussions about Lagiacrus

Around Wikia's network

Random Wiki