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


ID: Crawler


Sight: 1
Hearing: 1

Legs & Tail (see values in defense section)





Poisons x 2
Walk speed

1.55 walk - 5 run

Swim speed

4 slow - 8 fast



Can Enter Submarine?


only 1 of the items marked with an asterisk * may drop at a time
Items Chance
Alien Blood 100% (1/1)
Crawler Mask
2% (1/50)

The Crawler is a creature somewhat resembling merfolk, but twisted into a grotesque form. They are one of the most common creatures around the ocean in Barotrauma.


Crawlers are relatively small and agile, and are one of the few creatures capable of entering the Submarine. They possess four pairs of red eyes, green skin, segmented spines on their back and multiple hand-like appendages, with only the frontal ones having a functionality, allowing them to latch on surfaces, swim and crawl (hence their name).

Crawlers normally appear in small groups of 1-4 individuals (upper/lower limit depending on the local difficulty), compensating their individual frailty, but they can be seen in large swarms of 8 or 15 individuals in specific Terminate a Swarm missions.


Due to their size, Crawlers don't do much damage to the hull of the submarine, but their size allows them to easily fit inside a breach. Should they find a way in, they can become a danger to the crew.

Crawlers can be a nuisance as they often target an area of a submarine's hull that is not within line of sight of its defensive structures. There, they will often latch on to the hull and will gnaw away at it, causing constant leaks. This can be avoided with good positioning of the submarine on the Captain's part as well as using the submarine's electric discharge coil if available. Especially troublesome crawlers may also be smashed between obstacles in the environment and the submarine to great effect.

Multiple Crawlers can be a serious threat to a lone diver. If ambushed, the diver may be stunned from the attack long enough for the Crawler to retreat to avoid retaliation, opening up opportunities for other Crawlers to attack from different angles.

Crawlers can also claw their way through doors (though they take a long time to do so). Since Crawlers can only board the Submarine through hull breaches, it's recommended to wear a Diving Suit to protect oneself against the Pressure.

Killing a Crawler guarantees one unit of Alien Blood from its carcass (simply grab its body using G by default, and take the item from their inventory). Alien Blood is a medical reagent necessary to manufacture Blood Bags and Pulse Laser Fuel Boxes.

Combat Strategies

Crawlers are not picky eaters, and they tend to rapidly crowd around and consume any corpse (including the corpses of other Crawlers, which makes them opportunistic cannibals) over attacking the Submarine. This can be used to one's advantage if dispatching them from the safety of a Railgun or a Coilgun, but it does not apply to Divers, as Crawlers prioritize attacking players over eating. While eating, they will quickly regenerate 10 Vitality.

They will also flee at very low (<10) health, forcing the Submarine to chase them if part of a Mission. Fortunately, most weapons will outright kill them before reaching this point, if not bleed them to death. Melee weapons and small firearms are equally capable of dealing with Crawlers.


Attack Target type Afflictions on hitContextStructure DamageItem DamageDurationCooldownKinetic ForceNotes
Jaw Character
 Bite Wounds (3)*
 Bleeding (5)* (50% chance)
 Stun (0.1)* (50% chance)
Ground 0 0 0.25s 0.5 10 Heals the Crawler of any Damage (all) by 2 per hit.
Jump Attack Character
 Bite Wounds (12)*
 Stun (1.5)*
Ground 0 0 0.5s 5 20
Water Attack Character
 Bite Wounds (12)*
 Bleeding (12)* (50% chance)
 Stun (0.25)*
Water 0 0 0.5s 3 20 Heals the Crawler of any Damage (all) by 5 per hit.
Structure Attack Structure Any 35 10 0.5s 3 20



Limb Burn Damage (all)
Head x 1.5 x 1.5 
Legs & Tail x 0.75 x 0.75



  • The Crawler is by far the most common creature in the game, as well as one of the least damaging.
  • Their unavoidable nature and low damage often leads submarines to ram into groups of Crawlers and "scrape" them off of the sub via vertical movement, before they cause a breach.
  • Groups of Crawlers tend to gather in ruts and narrow spaces in submarines' hulls, causing significant collective damage to exterior walls in a small area.
  • The Crawler is currently the only character in the game (other than humans) that can succumb to the Husk Infection and become a Husk, however the Crawler's body needs to be perfectly intact upon succumbing to the infection: if even a single piece of its tail was dismembered, the Crawler will simply die.
  • Crawlers went through a complete redesign, compared to their Legacy counterpart, which resembled a giant Shrimp
  • The legacy variant of the Crawler can be spawned by the use of Commands or through the Character Editor, see Crawler (Legacy)


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