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ID: Hammerhead

350 (Boss: 400)

Sight: 2
Hearing: 1

Head, Tail, Fins, Arms, & Claws (see values in Defense section)



Immunities Vulnerabilities
Poisons x 0.6
Walk speed


Swim speed

8 slow - 12 fast



Can Enter Submarine?


only 1 of the items marked with an asterisk * may drop at a time
Items Chance
Swim Bladder 100% (1/1)
Alien Blood *
75% (1/1.3)
Hammerhead Ribs *
25% (1/4)

The Hammerhead is an uncommon creature found in the frigid oceans of Barotrauma.


Hammerheads are medium-size shark-like creatures. They have at least two pairs of eyes, four claws, four fins, and a long tail, which is their primary mode of locomotion.

Their most distinctive feature is their flat head, which is reminiscent of the head of a claw hammer.

Hammerheads are somewhat solitary creatures, but are sometimes seen in groups of up to five, though they typically come in groups of two to three.


Hammerheads are capable of inflicting considerable damage to the outer walls of a Submarine, utilizing their flat heads to bash holes in a given surface. They will relentlessly pound at the outer hull of the submarine and its occupants, being capable of stopping a fast moving sub dead in its tracks.

Hammerheads will protect Hammerhead Matriarchs, and attack any other creature on sight regardless as to whether the creature is stronger, or if the Hammerhead is wounded.

Combat Strategies

The Railgun is an incredibly effective weapon to use against the Hammerhead, as its high damage output allows the player to kill it in one to two shots depending on where they hit and what is loaded into the Railgun Shell. The Coilgun is slower but equally as effective, even with Regular Ammunition in use. Utilizing Piercing Ammunition can increase the speed of which the Coilgun kills the Hammerhead. Finally, the Pulse Laser is an incredibly effective, albeit expensive alternative to the Coilgun or Railgun.

The use of melee weapons is not recommended whilst fighting the Hammerhead. However, in a dire situation in which all other options have been exhausted, the player can use small arms weapons such as the SMG, Assault Rifle, Shotgun, or Autoshotgun. These weapons may not be as effective as onboard submarine weaponry, but they can be used in a crisis situation to neutralise the threat.


Hammerhead Bosses inflict +15% Affliction strength and structure damage.

Attack Target type Afflictions on hitAfflictions InsideArea of EffectStructure DamageItem DamageDurationCooldownKinetic Force
Nose Attack 1 Character
 Bite Wounds (80)*
 Stun (3)*
0 0.25s 10 10
Nose Attack 2 Structure Stun 3s 3m 75 (Direct hit)
150 (AoE)
60 0.25s 7 10
Claws Character
 Bite Wounds (40)*
 Bleeding (40)*
 Stun (0.1)*
0 10 0.2s 3 60



Limb Burn Bleeding Damage (all)
Head x 0.25 x 0.1 x 0.1 
Tail, Fins, & Arms x 1 x 0.75 x 0.75 
Claws x 0.5 x 0 x 0.5



  • The Hammerhead's internal ID used to be "Hammerheadboss"; in version, it was changed to "Hammerhead_m".
  • The Hammerhead's head has the shape of a hammer. The name is likely also a reference to the Hammerhead shark.
  • The Hammerhead is seen to have a mouth in some promotional materials for the game.


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