Hammerhead Matriarch

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Data is up-to-date
Last updated for version
Last mentioned in changelog
The current game version is

Hammerhead Matriarch

ID: Hammerheadmatriarch


Sight: 1
Hearing: 1

Skirt (see values in Defense section)



Immunities Vulnerabilities
Poisons x 0.5
Walk speed


Swim speed

2 slow - 6 fast


Only when attacked

Can Enter Submarine?


only 1 of the items marked with an asterisk * may drop at a time
Items Chance
Alien Blood x3
Swim Bladder
100% (1/1)

The Hammerhead Matriarch is a Europan creature related to the Hammerhead.


The Hammerhead Matriarch is a large, dark red squid-like creature with four arms attached to its torso. Despite the sharp appearance of these arms, the Hammerhead Matriarch is a docile creature. It avoids combat wherever possible, only responding aggressively when provoked. Its head is a large, fragile sac of eggs.


The Hammerhead Matriarch is not aggressive until provoked. Upon being attacked however, it will retaliate with its only form of attack; a suicidal, devastating assault on the Submarine's hull. The impact makes its egg sac burst, releasing 30 Hammerhead Spawn. The attack allows the Hammerhead Spawns entry into the sub, utilising swarm tactics to overwhelm Humans inside the submarine.

Combat Strategies

Due to the docile nature of the Hammerhead Matriarch, it is entirely viable to completely avoid it. Typically, it only becomes hostile due to misfires by a gunner, or if the player intentionally shoots it. If intentional combat is the preferred strategy, the Railgun will immediately kill it. It is not advised to use the Coilgun as it will only anger it, being unable to kill it quick enough. The Pulse Laser using Tri-Pulse Ammunition can also quickly kill it, however only in closer ranges as all three shots would land.

It is not advised to attempt to combat the Hammerhead Matriarch with melee weapons.


Attack Target type Afflictions on hitContextAfflictions InsideArea of EffectStructure DamageDurationCooldownKinetic ForceNotes
Nose Attack Submarine Any Stun 4.5s 4m 400 (Direct hit)
350 (AoE)
0.1s 15 5 Spawns 30 Hammerhead Spawn. Deals 1000 Internal Damage to itself.



Limb Burn Bleeding Internal Damage Lacerations Blunt Force Trauma Deep Tissue Injury Bite Wounds Gunshot Wound Organ Damage
Head x 10 x 1 x 2 x 10 x 2 x 1 x 2 x 10 x 1 
Skirt x 0.5 x 0.2 x 0.1 x 0.1 x 0.1 x 0.1 x 0.1 x 0.1 x 0.1




Pets Cthulhu    •   Defense Bot    •   Huskified Storage Container    •   Orange Boy    •   Peanut    •   Petraptor    •   Psilotoad
Small Crawler    •   Crawler Hatchling    •   Fractal Guardian (Steam Cannon Fractal Guardian   •   EMP Fractal Guardian)    •   Hammerhead Spawn    •   Human    •   Husk    •   Husked Crawler    •   Husked Human    •   Leucocyte    •   Mantis    •   Moloch Baby    •   Mudraptor (Mudraptor Unarmored)    •   Mudraptor Hatchling    •   Mudraptor Veteran    •   Swarm Feeder    •   Terminal Cells   •   Tiger Thresher    •   Tiger Thresher Hatchling
Large Black Moloch    •   Bone Thresher Crawler Broodmother   •   Giant Spineling    •   Golden Hammerhead    •   Hammerhead (Moping Jack)    •   Hammerhead Matriarch    •   Moloch    •   Spineling   •   Watcher
Abyssal Charybdis    •   Endworm    •   Latcher

Ancient     •   Cyborg Worm     •   Guardian Repair Bot     •   Jove     •   Portal Guardian