It is normal when first piloting a Prawn suit to feel a sense of limitless power. Prawn operators receive weeks of training to counteract this phenomenon. You will have to make do with self-discipline.


― PDA, Dialogue


The Pressure Reactive Armored Waterproof Nanosuit Mk III ("Prawn") is a bipedal mechanical walker designed for use in extreme-pressure and zero-gravity environments. A plasteel-reinforced canopy of enameled glass protects the single occupant, and dexterity is provided by hydraulic limbs that are capable of striking with enough force to crush bone and pulverize rock. When not in use, the vehicle assumes a seated position.

Lateral movement is provided by mechanical legs that propel the vehicle along the seabed at a top speed of 24 kph (14 mph), and a pair of small but powerful hydrogen boosters on the back of the vehicle provide vertical thrust. The Prawn Suit also comes with its own beacon, similar to the Cyclops and the Seamoth.

Before the Prawn Suit can be constructed, its fragments must be scanned. Four semi-intact Prawn Suit can be found in the Aurora's vehicle bay, which each account for a quarter of the blueprint; many smaller fragments can be found in various wrecks, which each count for a twentieth of the blueprint.

A 3D model can be found on Sketchfab.


The Prawn Suit can be used to explore places that are too deep for the Seamoth and too small for the Cyclops. It has a base crush depth of 900 meters and can be upgraded to withstand a maximum depth of 1700 meters, making it the best deep-sea exploration vehicle. However, due to its limited mobility in the vertical dimension it may be wise to use a Cyclops as a transport, as certain biomes such as the Blood Kelp Zone or Underwater Islands may be difficult for it to get out of on its own.

Unless the power supply is depleted, the player's oxygen tank will be replenished upon entering, as is the case with the Seamoth and the Cyclops. In this case, the oxygen will run out slowly until the point where the player is losing oxygen within the Prawn itself.

The Prawn has a health meter, and reaching zero will cause the vehicle to malfunction catastrophically and explode. Unlike the Seamoth, however, it's heavily armored and can endure most things that would otherwise severely damage or destroy a Seamoth, such as a Reaper Leviathan's grip.

Alternatively, the Prawn Suit can be used on land for exploration of dangerous areas. (Keep in mind that the Prawn Suit is not as mobile on land. The thrusters are nearly useless, even if the Prawn Suit Jump Jet Upgrade is equipped.) As the suit is immune to heat and poison (though not direct contact with lava), the Prawn Suit is also great for collecting resources in hazardous areas such as near Lava Geysers, or collecting Gas Pods, or for simple protection against most low-to-mid tier predators.

The Prawn Suit requires energy from two Power Cells to operate. It can be docked in the Cyclops or the Moonpool to recharge.

The vehicle comes equipped with a 24-slot inventory space, accessed from outside in the rear. Any items picked up with the claw arm or drilled with the drill arm are automatically placed in the Suit's inventory if there is room. Bear in mind though that there is a slight delay between clicking and activating the respective claw arm on the suit, so a player may accidentally punch a creature they are trying to collect or miss a falling item.


Plasteel IngotPlasteel IngotAerogelAerogelEnameled GlassDiamondDiamondLeadLeadArrow-right (1)Mobile Vehicle BayArrow-right (1)Exosuit

How to Use

  • Enter the Prawn Suit by clicking on it when the hand icon appears.
  • Pilot the Prawn Suit using the W, S, A and D keys.
  • Exiting the Prawn Suit by pressing the E key will cause it to assume a sitting position, allowing access to its power cells slots, storage compartment and upgrade panel.
  • Press the left and right mouse buttons to use the arms.
  • Press the spacebar to jump and hold it to use the thrusters. Using the thrusters will deplete their internal energy, which recharges by itself when not in use.

Upgrades and Customization

The Prawn Suit can be customized with the Vehicle Upgrade Console, which the player can use to craft upgrades and change the vehicle's name and color scheme. Upgrades can be installed and swapped via a panel on its left shoulder. Opening the panel reveals six slots - four for vehicle upgrades and two for arm attachments. The storage, hull reinforcement and engine efficiency modules are compatible with the Seamoth.

Prawn Suit Pressure Compensator Mark 1
Prawn Suit Depth Module

Increases the vehicle's maximum crush depth by 400 meters, enabling it to survive greater pressure. It does not stack, unlike other upgrades.

Depth Module Crush Depth
None 900 meters
Mk I 1300 meters
Mk II 1700 meters
Seamoth Storage Solution

Storage Module

Increases maximum onboard storage capacity by six slots. Effect stacks with multiple modules.

Modules Slots
0 24
1 30
2 36
3 42
4 48
Seamoth Hull Reinforcement

Hull Reinforcement

Strengthens chassis with a diamond lattice, permanently increasing hull durability. Decreases incoming damage by 20% and completely eliminates damage from ambient environmental hazards. Effect stacks with multiple modules.

Modules Damage Reduction
1 20%
2 40%
3 60%
4 80%
Seamoth Power Efficiency Module

Engine Efficiency Module

Increases maximum battery life by recycling engine thermal waste and decreases total power consumption by 15%. Effect stacks with multiple modules.

Modules Power Use Reduction
1 15%
2 30%
3 45%
4 60%
Exosuit Thermal Reactor Module

Prawn Suit Thermal Reactor

Replenishes the onboard power supply by harnessing the thermal energy in areas with an ambient temperature of 35ºC or greater. The charge rate depends on the amount of heat in the surrounding environment.


Charge Rate
35ºC (95ºF) 10%
50ºC (122ºF) 18%
65ºC (149ºF) 26%
80ºC (176ºF) 34%
95ºC (203ºF) 42%
110ºC (230ºF) 50%
Exosuit Jet Jump Upgrade

Prawn Suit Jump Jet Upgrade

Greatly increases thruster power and provides greater acceleration and maneuverability. Useful for reaching high ledges when used in conjunction with the grappling arm; burst-fire greatly increases lateral jump range.

(Activate by pressing and holding ​the spacebar on PC and Mac or the A button on the Xbox One)

Prawn Suit Claw Arm Module

Prawn Suit Claw Arm

Standard-issue environmental manipulation appendage. Useful for smashing small rocks for resources or delivering quick strikes to fend off predators. Items picked up are transferred to the onboard storage unit. Can be applied to either or both arms.

(Activate by pressing ​the corresponding mouse button on PC and Mac or pulling the corresponding trigger on Xbox One)

Exosuit Drill Arm

Prawn Suit Drill Arm

Allows for the drilling of large resource deposits, breaking them down into manageable fragments. Also an effective weapon against larger creatures. Can be applied to either arm.

(Activate by pressing ​the corresponding mouse button on PC and Mac or pulling the corresponding trigger on Xbox One)

Exosuit Grappling Arm Module

Prawn Suit Grappling Arm

Fires a magnetic grappling claw that latches onto any solid object and pulls the vehicle toward it. Useful for retrieving items from otherwise inaccessible areas and reaching high ledges when used in conjunction with the jump jets. Can be applied to either arm.

(Activate by pressing ​the corresponding mouse button on PC and Mac or pulling the corresponding trigger on Xbox One)

Propulsion Cannon for Exosuit

Prawn Suit Propulsion Cannon

Functions identically to the Propulsion Cannon tool. It can lift any item and launch it a significant distance using a gravitational distortion field. Useful for retrieving items from otherwise inaccessible areas. Can be applied to either arm.

(Activate by pressing ​the corresponding mouse button on PC and Mac or pulling the corresponding trigger on Xbox One)

Prawn Suit Torpedo Arm

Prawn Suit Torpedo Arm

Functions identically to the Seamoth torpedo launcher. Can hold up to six and fire two torpedoes simultaneously. Can be attached to both arms providing a total of twelve torpedoes. Can be applied to either or both arms.

(Activate by pressing ​the corresponding mouse button on PC and Mac or pulling the corresponding trigger on Xbox One)


Upon entering:

Prawn Suit Enter

Data Bank Entry


The Pressure Reactive Armored Waterproof Nanosuit is a range of mechs designed to protect the pilot from extreme environments. The Mk III is the latest iteration, and has so far only been rolled out by Alterra for their own high-value, phasegate-related operations.

  • The suit is fully insulated from the outside environment
  • Powerful hydraulic limbs allow for manipulation of objects and powered traversal of the environment
  • Rear-mounted thrusters provide maneuverability in low-gravity environments
  • A range of modifications are available to facilitate resource extraction and enhanced exploration

'The Prawn Suit: It's got you covered.'



  • The former name for the Prawn Suit was the P.R.A.W.N Suit, and in earlier development, Exosuit.
  • The idea for the Prawn Suit may be taken from the Exosuit from Natural Selection 2, another game made by Unknown Worlds Entertainment.
  • Early animations for the Prawn Suit can be viewed here and here.

Start a Discussion Discussions about Prawn Suit

  • Subnautica Wasabi One Diver In Inactive Lava Zone

    87 messages
    • DLGsW wrote:It's quite deep. I was only about 900 meters into it but the seamoth can only go about 900 meters now with the max upgrade...
    • wrote:Has anyone else seen this? Seen wut? The weird divers underneath? Then, yas, me seen them before. They weird.

    3 messages
    • I would exit out (if you have not done so already) and reload the game.
    • I restarted the game and it work THX YOU!!!!