In-game appearance
Location West Ocean
Bounty 18,000 G
Wanted Poster
The cause for the mysterious sudden disappearances of ships. Over one thousand ships to have been swallowed from antiquity.

Midgardsorm (ミドガルズオルム Midogaruzuorumu) is a fictional species of giant earthworm (Lumbricus terrestris gigantesque) that resides in West Ocean. He is the sixth boss in The Ocean Hunter.


Midgardsorm was responsible and wanted for the mysterious disappearances of numerous ships. Current records indicate that he had swallowed over a thousand marine vessels, including ships and submarines, since antiquity.

The bounty on the capture or death of this legendary gigantic earthworm is 18,000 G.

The Ocean HunterEdit

After defeating Basilosaurus, which they mistakened for as Midgardsorm, Torel and Chris watched as his corpse sank into the hole below ("Did we defeat him?"). Shortly after, the real Midgardsorm rose out from the hole and sucked in both the dead prehistoric whale and the two adventurers, the latter of which helplessly tried to escape the strong current. Soon after, Torel and Chris traverse the insides of the giant worm and reach his heart while being besieged by parasites and coming across a diver. After destroying the heart, which both killed Midgardsorm and ended his reign of West Ocean in the process, the giant worm let out one final bellow, allowing Torel, Chris, and the diver to escape.


Sunburst Area/Vulnerable areas: Heart (see image)
Sweet Spot/Weakpoint: Heart (see image)

Middy's heart

Because the player(s) are inside Midgardsorm for the entire duration of the battle, the only Sweet Spot available is the monster's own beating heart. The player(s) must continuously fire at it to reduce the monster's health.

However, the overwhelming number of parasites surrounding the heart will continuously try to stop the player(s). The minute they latch on, immediately fire at them before refocusing on the heart. Alternatively, if two players are playing, one can focus on the parasites while the other on the heart.

The more damage the player(s) inflict onto the monster, the heart will beat faster and more parasites will come at the player(s). Midgardsorm will be defeated once he runs out of health and when his heart explodes.


Midgardsorm refers to the Jörmungandr, also known as the Midgard Serpent, from Norse Mythology. According to the myth Odin threw Jörmungandr into the ocean that encircles Midgard, the realm of human civilization. The serpent grew so large that he was able to surround the earth and grasp its own tail. Consequently, if it lets go, the world will end.

It was predicted that during the events of Ragnarök, Jörmungandr will come out of the ocean to poison the sky. However, it will be slain by its arch-nemesis Thor, who will later die after walking nine paces due to being poisoned by the serpent's venom.


  • Midgardsorm is not one of Rahab's creations.
  • It is widely speculated that Midgardsorm had existed either before or during Rahab's time.