Calamity Mod Wiki
Cosmic Plushie.png
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Late Youtuber
This item is dedicated to: TotalBiscuit/TotalHalibut
Halibut Cannon
  • Halibut Cannon.png
Stack digit 1.png
Damage50 Ranged
Knockback1 (Extremely Weak)
Critical chance4%
Use time20 Very Fast
TooltipYes, it's still overpowered
RarityRarity Level: 10
Sell 20 Gold Coin.png
Dropped by
Adult Eidolon Wyrm1100%

The Halibut Cannon is a gun dropped from the Adult Eidolon Wyrm. It fires out between 25 and 35 bullets per shot that slowly spread out, while only consuming one unit of ammo.

Its best modifier is Unreal.


  • When using Acid Rounds or Ichor Bullets as ammo, its damage is reduced by 15%.
  • With the exception of God Slayer Slugs and Luminite Bullets, piercing bullets are not effective when using the Halibut Cannon as only one bullet will strike per salvo.
  • It is recommended players wait to fight the Adult Eidolon Wyrm until after both the Exo Mechs and Supreme Calamitas have been defeated.


  • This weapon is a reference to the late game critic TotalBiscuit, previously known as TotalHalibut, as indicated by the presence of stereotypical British attire on the weapon's sprite.
  • Halibut is a typical name of fish from the family of right eyed flounders.
  • Prior to update, this weapon could be obtained from any Abyss enemy with a 0.001% chance; from Abyss mini bosses with a 0.1% chance; and from the adult Eidolon Wyrm with a 100% chance.
  • This weapon is technically available as soon as the player enters hardmode, because the Adult Eidolon Wyrm can be summoned at any time by having the Chaos State debuff from the Rod of Discord while in the abyss; It can legitimately be acquired too, seeing as the Coldheart Icicle works on the Wyrm.

The Halibut Cannon being used on a Target Dummy.